3 files changed, 34 insertions, 0 deletions
diff --git a/source/blender/makesrna/intern/rna_render.c b/source/blender/makesrna/intern/rna_render.c
index 3126f3e11f4..0c2860c05e7 100644
--- a/source/blender/makesrna/intern/rna_render.c
+++ b/source/blender/makesrna/intern/rna_render.c
@@ -848,6 +848,14 @@ static void rna_def_render_engine(BlenderRNA *brna)
   RNA_def_property_ui_text(
       prop, "Use Eevee Viewport", "Uses Eevee for viewport shading in LookDev shading mode");
 
+  prop = RNA_def_property(srna, "bl_use_custom_freestyle", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "type->flag", RE_USE_CUSTOM_FREESTYLE);
+  RNA_def_property_flag(prop, PROP_REGISTER_OPTIONAL);
+  RNA_def_property_ui_text(
+      prop,
+      "Use Custom Freestyle",
+      "Handles freestyle rendering on its own, instead of delegating it to EEVEE");
+
   prop = RNA_def_property(srna, "bl_use_gpu_context", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "type->flag", RE_USE_GPU_CONTEXT);
   RNA_def_property_flag(prop, PROP_REGISTER_OPTIONAL);
diff --git a/source/blender/render/RE_engine.h b/source/blender/render/RE_engine.h
index 1af40ac760b..c31a41f66d5 100644
--- a/source/blender/render/RE_engine.h
+++ b/source/blender/render/RE_engine.h
@@ -64,6 +64,7 @@ extern "C" {
 #define RE_USE_SPHERICAL_STEREO 128
 #define RE_USE_STEREO_VIEWPORT 256
 #define RE_USE_GPU_CONTEXT 512
+#define RE_USE_CUSTOM_FREESTYLE 1024
 
 /* RenderEngine.flag */
 #define RE_ENGINE_ANIMATION 1
diff --git a/source/blender/render/intern/pipeline.c b/source/blender/render/intern/pipeline.c
index 320f8b8ed03..8567835f55c 100644
--- a/source/blender/render/intern/pipeline.c
+++ b/source/blender/render/intern/pipeline.c
@@ -2007,13 +2007,38 @@ void RE_RenderFrame(Render *re,
   G.is_rendering = false;
 }
 
+static void change_renderdata_engine(Render *re, const char *new_engine)
+{
+  if (!STREQ(re->r.engine, new_engine)) {
+    if (re->engine) {
+      RE_engine_free(re->engine);
+      re->engine = NULL;
+    }
+    BLI_strncpy(re->r.engine, new_engine, sizeof(re->r.engine));
+  }
+}
+
 #ifdef WITH_FREESTYLE
+static bool use_eevee_for_freestyle_render(Render *re)
+{
+  RenderEngineType *type = RE_engines_find(re->r.engine);
+  return !(type->flag & RE_USE_CUSTOM_FREESTYLE);
+}
+
 void RE_RenderFreestyleStrokes(Render *re, Main *bmain, Scene *scene, int render)
 {
   re->result_ok = 0;
   if (render_init_from_main(re, &scene->r, bmain, scene, NULL, NULL, 0, 0)) {
     if (render) {
+      char scene_engine[32];
+      BLI_strncpy(scene_engine, re->r.engine, sizeof(scene_engine));
+      if (use_eevee_for_freestyle_render(re)) {
+        change_renderdata_engine(re, RE_engine_id_BLENDER_EEVEE);
+      }
+
       do_render_3d(re);
+
+      change_renderdata_engine(re, scene_engine);
     }
   }
   re->result_ok = 1;