Fix T41715 fill tools not respecting alpha lock

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_image_proj.c b/source/blender/editors/sculpt_paint/paint_image_proj.c
index 56bb8af311c..40ac2e8902a 100644
--- a/source/blender/editors/sculpt_paint/paint_image_proj.c
+++ b/source/blender/editors/sculpt_paint/paint_image_proj.c
@@ -4121,6 +4121,11 @@ static void *do_projectpaint_thread(void *ph_v)
 							                     projPixel->newColor.ch, ps->blend);
 						}
 					}
+					
+					if (lock_alpha) {
+						if (is_floatbuf) projPixel->pixel.f_pt[3] = projPixel->origColor.f_pt[3];
+						else projPixel->pixel.ch_pt[3] = projPixel->origColor.ch_pt[3];
+					}
 
 					last_partial_redraw_cell = last_projIma->partRedrawRect + projPixel->bb_cell_index;
 					last_partial_redraw_cell->x1 = min_ii(last_partial_redraw_cell->x1, (int)projPixel->x_px);