Texture painting:

Free draw objects instead of tagging object update and doing
recalculation of derived meshes. The reason is that if user deletes all
slots and tries to paint, the system will invalidate the cached in
projection painting derivedmesh. This will promptly crash. Invalidating
the draw objects only is also much cheaper.

1 files changed, 5 insertions, 2 deletions

diff --git a/source/blender/makesrna/intern/rna_sculpt_paint.c b/source/blender/makesrna/intern/rna_sculpt_paint.c
index c4b5461dece..d48d8589f96 100644
--- a/source/blender/makesrna/intern/rna_sculpt_paint.c
+++ b/source/blender/makesrna/intern/rna_sculpt_paint.c
@@ -76,11 +76,14 @@ EnumPropertyItem symmetrize_direction_items[] = {
 #include "MEM_guardedalloc.h"
 
 #include "BKE_context.h"
+#include "BKE_DerivedMesh.h"
 #include "BKE_pointcache.h"
 #include "BKE_particle.h"
 #include "BKE_depsgraph.h"
 #include "BKE_pbvh.h"
 
+#include "GPU_buffers.h"
+
 #include "ED_particle.h"
 
 static EnumPropertyItem particle_edit_disconnected_hair_brush_items[] = {
@@ -304,8 +307,8 @@ static void rna_ImaPaint_mode_update(Main *UNUSED(bmain), Scene *scene, PointerR
 	/* of course we need to invalidate here */
 	BKE_texpaint_slots_refresh_object(scene, ob);
 
-	/* we assume that changing the current mode will invalidate the uv layers so we need to tag an update */
-	DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
+	/* we assume that changing the current mode will invalidate the uv layers so we need to refresh display */
+	GPU_drawobject_free(ob->derivedFinal);	
 	WM_main_add_notifier(NC_GEOM | ND_DATA, &ob->id);
 }