Removing Vertex Colors
From polycount
Removing Vertex Color in 3DSMax
If you wish to remove all color information from either the vertex color or vertex illumination channel, follow these steps:
1. Select the object
2. Go to the Tools menu and select Channel Info at the bottom.
3. Next, the Map Channel Info window will appear. Select the channel you wish to clear (either "vc" for Vertex Colors or "Illum" for Vertex Illumination) and click the "clear" button. The vertex color or illumination should now be gone and you can start painting on a clean slate.
