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Diffstat (limited to 'source/blender/makesdna/DNA_meshdata_types.h')
-rw-r--r--source/blender/makesdna/DNA_meshdata_types.h11
1 files changed, 8 insertions, 3 deletions
diff --git a/source/blender/makesdna/DNA_meshdata_types.h b/source/blender/makesdna/DNA_meshdata_types.h
index b85bdecee02..2323c95d8ba 100644
--- a/source/blender/makesdna/DNA_meshdata_types.h
+++ b/source/blender/makesdna/DNA_meshdata_types.h
@@ -118,9 +118,14 @@ typedef struct MLoopUV {
#define MLOOPUV_VERTSEL 2
#define MLOOPUV_PINNED 4
-/* at the moment alpha is abused for vertex painting
- * and not used for transparency,
- * note that red and blue are _not_ swapped, as they are with #MCol */
+/**
+ * at the moment alpha is abused for vertex painting,
+ * otherwise it should _always_ be initialized to 255
+ * Mostly its not used for transparency...
+ * (except for blender-internal rendering, see [#34096]).
+ *
+ * \note red and blue are _not_ swapped, as they are with #MCol
+ */
typedef struct MLoopCol {
char r, g, b, a;
} MLoopCol;