[Bf-blender-cvs] [e790aa1f19e] master: Writefile: Cleanup material runtime data.

[Bastien Montagne]

Commit: e790aa1f19ebed6d8135d8cc71003f490cbc219e
Author: Bastien Montagne
Date:   Wed Apr 1 10:15:13 2020 +0200
Branches: master
https://developer.blender.org/rBe790aa1f19ebed6d8135d8cc71003f490cbc219e

Writefile: Cleanup material runtime data.

===================================================================

M	source/blender/blenloader/intern/writefile.c

===================================================================

diff --git a/source/blender/blenloader/intern/writefile.c b/source/blender/blenloader/intern/writefile.c
index a8f219ccf84..4307d3c076f 100644
--- a/source/blender/blenloader/intern/writefile.c
+++ b/source/blender/blenloader/intern/writefile.c
@@ -2361,6 +2361,10 @@ static void write_texture(WriteData *wd, Tex *tex, const void *id_address)
 static void write_material(WriteData *wd, Material *ma, const void *id_address)
 {
   if (ma->id.us > 0 || wd->use_memfile) {
+    /* Clean up, important in undo case to reduce false detection of changed datablocks. */
+    ma->texpaintslot = NULL;
+    BLI_listbase_clear(&ma->gpumaterial);
+
     /* write LibData */
     writestruct_at_address(wd, ID_MA, Material, 1, id_address, ma);
     write_iddata(wd, &ma->id);