Remove Threaded Sculpt option

Threaded Sculpt is now always enabled by default. If it causes
performance problems compared single threaded sculpt it should be
considered a bug.

Reviewed By: sergey

Maniphest Tasks: T77638

Differential Revision: https://developer.blender.org/D7960

18 files changed, 61 insertions, 76 deletions

diff --git a/release/scripts/startup/bl_ui/space_view3d_toolbar.py b/release/scripts/startup/bl_ui/space_view3d_toolbar.py
index a951025166e..ef071cbc179 100644
--- a/release/scripts/startup/bl_ui/space_view3d_toolbar.py
+++ b/release/scripts/startup/bl_ui/space_view3d_toolbar.py
@@ -831,7 +831,6 @@ class VIEW3D_PT_sculpt_options(Panel, View3DPaintPanel):
         sculpt = tool_settings.sculpt
 
         col = layout.column(heading="Display", align=True)
-        col.prop(sculpt, "use_threaded", text="Threaded Sculpt")
         col.prop(sculpt, "show_low_resolution")
         col.prop(sculpt, "use_sculpt_delay_updates")
         col.prop(sculpt, "use_deform_only")
diff --git a/source/blender/editors/sculpt_paint/paint_mask.c b/source/blender/editors/sculpt_paint/paint_mask.c
index 07a6b2873f4..d0fa5213e33 100644
--- a/source/blender/editors/sculpt_paint/paint_mask.c
+++ b/source/blender/editors/sculpt_paint/paint_mask.c
@@ -169,7 +169,7 @@ static int mask_flood_fill_exec(bContext *C, wmOperator *op)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, mask_flood_fill_task_cb, &settings);
 
   if (multires) {
@@ -344,7 +344,7 @@ bool ED_sculpt_mask_box_select(struct bContext *C, ViewContext *vc, const rcti *
       };
 
       TaskParallelSettings settings;
-      BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+      BKE_pbvh_parallel_range_settings(&settings, true, totnode);
       BLI_task_parallel_range(0, totnode, &data, mask_box_select_task_cb, &settings);
 
       if (nodes) {
@@ -533,7 +533,7 @@ static int paint_mask_gesture_lasso_exec(bContext *C, wmOperator *op)
         data.task_data.value = value;
 
         TaskParallelSettings settings;
-        BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+        BKE_pbvh_parallel_range_settings(&settings, true, totnode);
         BLI_task_parallel_range(0, totnode, &data, mask_gesture_lasso_task_cb, &settings);
 
         if (nodes) {
diff --git a/source/blender/editors/sculpt_paint/paint_vertex.c b/source/blender/editors/sculpt_paint/paint_vertex.c
index 69c0d5bb712..6dce1ef6b0e 100644
--- a/source/blender/editors/sculpt_paint/paint_vertex.c
+++ b/source/blender/editors/sculpt_paint/paint_vertex.c
@@ -2171,7 +2171,7 @@ static void calculate_average_weight(SculptThreadedTaskData *data,
   data->custom_data = accum;
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (data->sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, data, do_wpaint_brush_calc_average_weight_cb_ex, &settings);
 
   uint accum_len = 0;
diff --git a/source/blender/editors/sculpt_paint/sculpt.c b/source/blender/editors/sculpt_paint/sculpt.c
index c45f01ae7cd..123f585b250 100644
--- a/source/blender/editors/sculpt_paint/sculpt.c
+++ b/source/blender/editors/sculpt_paint/sculpt.c
@@ -837,7 +837,7 @@ int SCULPT_nearest_vertex_get(
   nvtd.nearest_vertex_distance_squared = FLT_MAX;
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   settings.func_reduce = nearest_vertex_get_reduce;
   settings.userdata_chunk = &nvtd;
   settings.userdata_chunk_size = sizeof(NearestVertexTLSData);
@@ -1321,7 +1321,7 @@ static void paint_mesh_restore_co(Sculpt *sd, Object *ob)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP) && !ss->bm, totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true && !ss->bm, totnode);
   BLI_task_parallel_range(0, totnode, &data, paint_mesh_restore_co_task_cb, &settings);
 
   BKE_pbvh_node_color_buffer_free(ss->pbvh);
@@ -1952,7 +1952,7 @@ static void calc_area_center(
   AreaNormalCenterTLSData anctd = {{{0}}};
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   settings.func_reduce = calc_area_normal_and_center_reduce;
   settings.userdata_chunk = &anctd;
   settings.userdata_chunk_size = sizeof(AreaNormalCenterTLSData);
@@ -1981,8 +1981,7 @@ void SCULPT_calc_area_normal(
     Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode, float r_area_no[3])
 {
   const Brush *brush = BKE_paint_brush(&sd->paint);
-  bool use_threading = (sd->flags & SCULPT_USE_OPENMP);
-  SCULPT_pbvh_calc_area_normal(brush, ob, nodes, totnode, use_threading, r_area_no);
+  SCULPT_pbvh_calc_area_normal(brush, ob, nodes, totnode, true, r_area_no);
 }
 
 /* Expose 'calc_area_normal' externally. */
@@ -2052,7 +2051,7 @@ static void calc_area_normal_and_center(
   AreaNormalCenterTLSData anctd = {{{0}}};
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   settings.func_reduce = calc_area_normal_and_center_reduce;
   settings.userdata_chunk = &anctd;
   settings.userdata_chunk_size = sizeof(AreaNormalCenterTLSData);
@@ -2717,7 +2716,7 @@ static void bmesh_topology_rake(
         .strength = factor,
     };
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
 
     BLI_task_parallel_range(0, totnode, &data, do_topology_rake_bmesh_task_cb_ex, &settings);
   }
@@ -2774,7 +2773,7 @@ static void do_mask_brush_draw(Sculpt *sd, Object *ob, PBVHNode **nodes, int tot
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_mask_brush_draw_task_cb_ex, &settings);
 }
 
@@ -2862,7 +2861,7 @@ static void do_draw_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_draw_brush_task_cb_ex, &settings);
 }
 
@@ -2939,7 +2938,7 @@ static void do_draw_sharp_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int to
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_draw_sharp_brush_task_cb_ex, &settings);
 }
 
@@ -3126,7 +3125,7 @@ static void do_slide_relax_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int t
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   if (ss->cache->alt_smooth) {
     for (int i = 0; i < 4; i++) {
       BLI_task_parallel_range(0, totnode, &data, do_topology_relax_task_cb_ex, &settings);
@@ -3336,7 +3335,7 @@ static void do_crease_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnod
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_crease_brush_task_cb_ex, &settings);
 }
 
@@ -3450,7 +3449,7 @@ static void do_pinch_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_pinch_brush_task_cb_ex, &settings);
 }
 
@@ -3523,7 +3522,7 @@ static void do_grab_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_grab_brush_task_cb_ex, &settings);
 }
 
@@ -3632,7 +3631,7 @@ static void do_elastic_deform_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, in
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_elastic_deform_brush_task_cb_ex, &settings);
 }
 
@@ -3839,7 +3838,7 @@ static void do_nudge_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_nudge_brush_task_cb_ex, &settings);
 }
 
@@ -3961,7 +3960,7 @@ static void do_snake_hook_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int to
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_snake_hook_brush_task_cb_ex, &settings);
 }
 
@@ -4034,7 +4033,7 @@ static void do_thumb_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_thumb_brush_task_cb_ex, &settings);
 }
 
@@ -4108,7 +4107,7 @@ static void do_rotate_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnod
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_rotate_brush_task_cb_ex, &settings);
 }
 
@@ -4224,7 +4223,7 @@ static void do_layer_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_layer_brush_task_cb_ex, &settings);
 }
 
@@ -4291,7 +4290,7 @@ static void do_inflate_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totno
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_inflate_brush_task_cb_ex, &settings);
 }
 
@@ -4416,7 +4415,7 @@ static void do_flatten_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totno
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_flatten_brush_task_cb_ex, &settings);
 }
 
@@ -4567,7 +4566,7 @@ static void do_clay_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode)
   ClaySampleData csd = {{0}};
 
   TaskParallelSettings sample_settings;
-  BKE_pbvh_parallel_range_settings(&sample_settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&sample_settings, true, totnode);
   sample_settings.func_reduce = calc_clay_surface_reduce;
   sample_settings.userdata_chunk = &csd;
   sample_settings.userdata_chunk_size = sizeof(ClaySampleData);
@@ -4598,7 +4597,7 @@ static void do_clay_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_clay_brush_task_cb_ex, &settings);
 }
 
@@ -4749,7 +4748,7 @@ static void do_clay_strips_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int t
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_clay_strips_brush_task_cb_ex, &settings);
 }
 
@@ -4843,7 +4842,7 @@ static void do_fill_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_fill_brush_task_cb_ex, &settings);
 }
 
@@ -4936,7 +4935,7 @@ static void do_scrape_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnod
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_scrape_brush_task_cb_ex, &settings);
 }
 
@@ -5109,7 +5108,7 @@ static void do_clay_thumb_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int to
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_clay_thumb_brush_task_cb_ex, &settings);
 }
 
@@ -5181,7 +5180,7 @@ static void do_gravity(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode, fl
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_gravity_task_cb_ex, &settings);
 }
 
@@ -5407,7 +5406,7 @@ static void do_brush_action(Sculpt *sd, Object *ob, Brush *brush, UnifiedPaintSe
     };
 
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
     BLI_task_parallel_range(0, totnode, &task_data, do_brush_action_task_cb, &settings);
 
     if (sculpt_brush_needs_normal(ss, brush)) {
@@ -5670,7 +5669,7 @@ static void sculpt_combine_proxies(Sculpt *sd, Object *ob)
     };
 
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
     BLI_task_parallel_range(0, totnode, &data, sculpt_combine_proxies_task_cb, &settings);
   }
 
@@ -5758,7 +5757,7 @@ void SCULPT_flush_stroke_deform(Sculpt *sd, Object *ob, bool is_proxy_used)
     };
 
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
     BLI_task_parallel_range(0, totnode, &data, SCULPT_flush_stroke_deform_task_cb, &settings);
 
     if (vertCos) {
diff --git a/source/blender/editors/sculpt_paint/sculpt_cloth.c b/source/blender/editors/sculpt_paint/sculpt_cloth.c
index 552080fce9d..c821685e8b1 100644
--- a/source/blender/editors/sculpt_paint/sculpt_cloth.c
+++ b/source/blender/editors/sculpt_paint/sculpt_cloth.c
@@ -547,7 +547,7 @@ static void cloth_brush_do_simulation_step(
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(
       0, totnode, &solve_simulation_data, do_cloth_brush_solve_simulation_task_cb_ex, &settings);
 }
@@ -622,7 +622,7 @@ static void cloth_brush_apply_brush_foces(Sculpt *sd, Object *ob, PBVHNode **nod
   }
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(
       0, totnode, &apply_forces_data, do_cloth_brush_apply_forces_task_cb_ex, &settings);
 }
@@ -872,8 +872,7 @@ static int sculpt_cloth_filter_modal(bContext *C, wmOperator *op, const wmEvent
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(
-      &settings, (sd->flags & SCULPT_USE_OPENMP), ss->filter_cache->totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, ss->filter_cache->totnode);
   BLI_task_parallel_range(
       0, ss->filter_cache->totnode, &data, cloth_filter_apply_forces_task_cb, &settings);
 
diff --git a/source/blender/editors/sculpt_paint/sculpt_face_set.c b/source/blender/editors/sculpt_paint/sculpt_face_set.c
index 57dc70c5276..031b4f8731d 100644
--- a/source/blender/editors/sculpt_paint/sculpt_face_set.c
+++ b/source/blender/editors/sculpt_paint/sculpt_face_set.c
@@ -203,7 +203,7 @@ void SCULPT_do_draw_face_sets_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, in
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   if (ss->cache->alt_smooth) {
     for (int i = 0; i < 4; i++) {
       BLI_task_parallel_range(0, totnode, &data, do_relax_face_sets_brush_task_cb_ex, &settings);
diff --git a/source/blender/editors/sculpt_paint/sculpt_filter_color.c b/source/blender/editors/sculpt_paint/sculpt_filter_color.c
index b78f027fa9c..391318c84a4 100644
--- a/source/blender/editors/sculpt_paint/sculpt_filter_color.c
+++ b/source/blender/editors/sculpt_paint/sculpt_filter_color.c
@@ -236,8 +236,7 @@ static int sculpt_color_filter_modal(bContext *C, wmOperator *op, const wmEvent
   TaskParallelSettings settings;
   BLI_parallel_range_settings_defaults(&settings);
 
-  BKE_pbvh_parallel_range_settings(
-      &settings, (sd->flags & SCULPT_USE_OPENMP), ss->filter_cache->totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, ss->filter_cache->totnode);
   BLI_task_parallel_range(0, ss->filter_cache->totnode, &data, color_filter_task_cb, &settings);
 
   SCULPT_flush_update_step(C, SCULPT_UPDATE_COLOR);
diff --git a/source/blender/editors/sculpt_paint/sculpt_filter_mask.c b/source/blender/editors/sculpt_paint/sculpt_filter_mask.c
index f5d33d44350..83145f5600f 100644
--- a/source/blender/editors/sculpt_paint/sculpt_filter_mask.c
+++ b/source/blender/editors/sculpt_paint/sculpt_filter_mask.c
@@ -247,7 +247,7 @@ static int sculpt_mask_filter_exec(bContext *C, wmOperator *op)
     };
 
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
     BLI_task_parallel_range(0, totnode, &data, mask_filter_task_cb, &settings);
 
     if (ELEM(filter_type, MASK_FILTER_GROW, MASK_FILTER_SHRINK)) {
@@ -276,7 +276,7 @@ void SCULPT_mask_filter_smooth_apply(
 
   for (int i = 0; i < smooth_iterations; i++) {
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
     BLI_task_parallel_range(0, totnode, &data, mask_filter_task_cb, &settings);
   }
 }
@@ -459,7 +459,7 @@ static int sculpt_dirty_mask_exec(bContext *C, wmOperator *op)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
 
   settings.func_reduce = dirty_mask_compute_range_reduce;
   settings.userdata_chunk = &range;
diff --git a/source/blender/editors/sculpt_paint/sculpt_filter_mesh.c b/source/blender/editors/sculpt_paint/sculpt_filter_mesh.c
index 468945e6c42..494588d0996 100644
--- a/source/blender/editors/sculpt_paint/sculpt_filter_mesh.c
+++ b/source/blender/editors/sculpt_paint/sculpt_filter_mesh.c
@@ -114,8 +114,7 @@ void SCULPT_filter_cache_init(Object *ob, Sculpt *sd, const int undo_type)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(
-      &settings, (sd->flags & SCULPT_USE_OPENMP), ss->filter_cache->totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, ss->filter_cache->totnode);
   BLI_task_parallel_range(
       0, ss->filter_cache->totnode, &data, filter_cache_init_task_cb, &settings);
 }
@@ -487,8 +486,7 @@ static int sculpt_mesh_filter_modal(bContext *C, wmOperator *op, const wmEvent *
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(
-      &settings, (sd->flags & SCULPT_USE_OPENMP), ss->filter_cache->totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, ss->filter_cache->totnode);
   BLI_task_parallel_range(0, ss->filter_cache->totnode, &data, mesh_filter_task_cb, &settings);
 
   if (filter_type == MESH_FILTER_SURFACE_SMOOTH) {
diff --git a/source/blender/editors/sculpt_paint/sculpt_mask_expand.c b/source/blender/editors/sculpt_paint/sculpt_mask_expand.c
index 8868eae47d8..60483cc168d 100644
--- a/source/blender/editors/sculpt_paint/sculpt_mask_expand.c
+++ b/source/blender/editors/sculpt_paint/sculpt_mask_expand.c
@@ -289,8 +289,7 @@ static int sculpt_mask_expand_modal(bContext *C, wmOperator *op, const wmEvent *
         .mask_expand_create_face_set = RNA_boolean_get(op->ptr, "create_face_set"),
     };
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(
-        &settings, (sd->flags & SCULPT_USE_OPENMP), ss->filter_cache->totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, ss->filter_cache->totnode);
     BLI_task_parallel_range(0, ss->filter_cache->totnode, &data, sculpt_expand_task_cb, &settings);
     ss->filter_cache->mask_update_current_it = mask_expand_update_it;
   }
@@ -459,8 +458,7 @@ static int sculpt_mask_expand_invoke(bContext *C, wmOperator *op, const wmEvent
       .mask_expand_create_face_set = RNA_boolean_get(op->ptr, "create_face_set"),
   };
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(
-      &settings, (sd->flags & SCULPT_USE_OPENMP), ss->filter_cache->totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, ss->filter_cache->totnode);
   BLI_task_parallel_range(0, ss->filter_cache->totnode, &data, sculpt_expand_task_cb, &settings);
 
   const char *status_str = TIP_(
diff --git a/source/blender/editors/sculpt_paint/sculpt_multiplane_scrape.c b/source/blender/editors/sculpt_paint/sculpt_multiplane_scrape.c
index f3327706102..503f9429a50 100644
--- a/source/blender/editors/sculpt_paint/sculpt_multiplane_scrape.c
+++ b/source/blender/editors/sculpt_paint/sculpt_multiplane_scrape.c
@@ -304,7 +304,7 @@ void SCULPT_do_multiplane_scrape_brush(Sculpt *sd, Object *ob, PBVHNode **nodes,
     MultiplaneScrapeSampleData mssd = {{{0}}};
 
     TaskParallelSettings sample_settings;
-    BKE_pbvh_parallel_range_settings(&sample_settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&sample_settings, true, totnode);
     sample_settings.func_reduce = calc_multiplane_scrape_surface_reduce;
     sample_settings.userdata_chunk = &mssd;
     sample_settings.userdata_chunk_size = sizeof(MultiplaneScrapeSampleData);
@@ -395,7 +395,7 @@ void SCULPT_do_multiplane_scrape_brush(Sculpt *sd, Object *ob, PBVHNode **nodes,
   plane_from_point_normal_v3(data.multiplane_scrape_planes[0], area_co, plane_no);
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_multiplane_scrape_brush_task_cb_ex, &settings);
 }
 
diff --git a/source/blender/editors/sculpt_paint/sculpt_paint_color.c b/source/blender/editors/sculpt_paint/sculpt_paint_color.c
index 3b6343a0920..191d18cb543 100644
--- a/source/blender/editors/sculpt_paint/sculpt_paint_color.c
+++ b/source/blender/editors/sculpt_paint/sculpt_paint_color.c
@@ -291,7 +291,7 @@ void SCULPT_do_paint_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode
     };
 
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
     BLI_task_parallel_range(0, totnode, &data, do_color_smooth_task_cb_exec, &settings);
     return;
   }
@@ -313,7 +313,7 @@ void SCULPT_do_paint_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode
     zero_v4(swptd.color);
 
     TaskParallelSettings settings_sample;
-    BKE_pbvh_parallel_range_settings(&settings_sample, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings_sample, true, totnode);
     settings_sample.func_reduce = sample_wet_paint_reduce;
     settings_sample.userdata_chunk = &swptd;
     settings_sample.userdata_chunk_size = sizeof(SampleWetPaintTLSData);
@@ -345,7 +345,7 @@ void SCULPT_do_paint_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_paint_brush_task_cb_ex, &settings);
 }
 
@@ -460,7 +460,7 @@ void SCULPT_do_smear_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
 
   /* Smooth colors mode. */
   if (ss->cache->alt_smooth) {
diff --git a/source/blender/editors/sculpt_paint/sculpt_pose.c b/source/blender/editors/sculpt_paint/sculpt_pose.c
index a4a87051e03..0acf90cd1df 100644
--- a/source/blender/editors/sculpt_paint/sculpt_pose.c
+++ b/source/blender/editors/sculpt_paint/sculpt_pose.c
@@ -293,7 +293,7 @@ static void sculpt_pose_grow_pose_factor(Sculpt *sd,
   PoseGrowFactorTLSData gftd;
   gftd.pos_count = 0;
   zero_v3(gftd.pos_avg);
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   settings.func_reduce = pose_brush_grow_factor_reduce;
   settings.userdata_chunk = &gftd;
   settings.userdata_chunk_size = sizeof(PoseGrowFactorTLSData);
@@ -975,7 +975,7 @@ void SCULPT_pose_brush_init(Sculpt *sd, Object *ob, SculptSession *ss, Brush *br
     data.pose_factor = ss->cache->pose_ik_chain->segments[ik].weights;
     for (int i = 0; i < br->pose_smooth_iterations; i++) {
       TaskParallelSettings settings;
-      BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+      BKE_pbvh_parallel_range_settings(&settings, true, totnode);
       BLI_task_parallel_range(0, totnode, &data, pose_brush_init_task_cb_ex, &settings);
     }
   }
@@ -1198,7 +1198,7 @@ void SCULPT_do_pose_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode)
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   BLI_task_parallel_range(0, totnode, &data, do_pose_brush_task_cb_ex, &settings);
 }
 
diff --git a/source/blender/editors/sculpt_paint/sculpt_smooth.c b/source/blender/editors/sculpt_paint/sculpt_smooth.c
index 3ef8c43ee56..aa82ae1d7ad 100644
--- a/source/blender/editors/sculpt_paint/sculpt_smooth.c
+++ b/source/blender/editors/sculpt_paint/sculpt_smooth.c
@@ -453,7 +453,7 @@ void SCULPT_smooth(Sculpt *sd,
     };
 
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
 
     switch (type) {
       case PBVH_GRIDS:
@@ -628,7 +628,7 @@ void SCULPT_do_surface_smooth_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, in
   };
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
   for (int i = 0; i < brush->surface_smooth_iterations; i++) {
     BLI_task_parallel_range(
         0, totnode, &data, SCULPT_do_surface_smooth_brush_laplacian_task_cb_ex, &settings);
diff --git a/source/blender/editors/sculpt_paint/sculpt_transform.c b/source/blender/editors/sculpt_paint/sculpt_transform.c
index 914b1d67a6d..f616817c330 100644
--- a/source/blender/editors/sculpt_paint/sculpt_transform.c
+++ b/source/blender/editors/sculpt_paint/sculpt_transform.c
@@ -178,8 +178,7 @@ void ED_sculpt_update_modal_transform(struct bContext *C)
   }
 
   TaskParallelSettings settings;
-  BKE_pbvh_parallel_range_settings(
-      &settings, (sd->flags & SCULPT_USE_OPENMP), ss->filter_cache->totnode);
+  BKE_pbvh_parallel_range_settings(&settings, true, ss->filter_cache->totnode);
   BLI_task_parallel_range(
       0, ss->filter_cache->totnode, &data, sculpt_transform_task_cb, &settings);
 
diff --git a/source/blender/editors/sculpt_paint/sculpt_undo.c b/source/blender/editors/sculpt_paint/sculpt_undo.c
index c8bf901b2ef..a1c53d6aad0 100644
--- a/source/blender/editors/sculpt_paint/sculpt_undo.c
+++ b/source/blender/editors/sculpt_paint/sculpt_undo.c
@@ -439,7 +439,7 @@ static void sculpt_undo_bmesh_restore_generic(bContext *C,
     BKE_pbvh_search_gather(ss->pbvh, NULL, NULL, &nodes, &totnode);
 
     TaskParallelSettings settings;
-    BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
+    BKE_pbvh_parallel_range_settings(&settings, true, totnode);
     BLI_task_parallel_range(
         0, totnode, nodes, sculpt_undo_bmesh_restore_generic_task_cb, &settings);
 
diff --git a/source/blender/makesdna/DNA_scene_types.h b/source/blender/makesdna/DNA_scene_types.h
index 524103cb371..624323c42f6 100644
--- a/source/blender/makesdna/DNA_scene_types.h
+++ b/source/blender/makesdna/DNA_scene_types.h
@@ -2174,7 +2174,7 @@ typedef enum eSculptFlags {
 
   SCULPT_FLAG_UNUSED_6 = (1 << 6), /* cleared */
 
-  SCULPT_USE_OPENMP = (1 << 7),
+  SCULPT_FLAG_UNUSED_7 = (1 << 7), /* cleared */
   SCULPT_ONLY_DEFORM = (1 << 8),
   // SCULPT_SHOW_DIFFUSE = (1 << 9), // deprecated
 
diff --git a/source/blender/makesrna/intern/rna_sculpt_paint.c b/source/blender/makesrna/intern/rna_sculpt_paint.c
index 381908f7ada..8532bf9afab 100644
--- a/source/blender/makesrna/intern/rna_sculpt_paint.c
+++ b/source/blender/makesrna/intern/rna_sculpt_paint.c
@@ -763,12 +763,6 @@ static void rna_def_sculpt(BlenderRNA *brna)
   RNA_def_property_ui_text(prop, "Lock Z", "Disallow changes to the Z axis of vertices");
   RNA_def_property_update(prop, NC_SCENE | ND_TOOLSETTINGS, NULL);
 
-  prop = RNA_def_property(srna, "use_threaded", PROP_BOOLEAN, PROP_NONE);
-  RNA_def_property_boolean_sdna(prop, NULL, "flags", SCULPT_USE_OPENMP);
-  RNA_def_property_ui_text(
-      prop, "Use OpenMP", "Take advantage of multiple CPU cores to improve sculpting performance");
-  RNA_def_property_update(prop, NC_SCENE | ND_TOOLSETTINGS, NULL);
-
   prop = RNA_def_property(srna, "use_deform_only", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "flags", SCULPT_ONLY_DEFORM);
   RNA_def_property_ui_text(prop,