Ability to see transparency in the viewport
When painting opacity mask, it would be useful to see the transparency in the viewport.
Must have to paint hair, torn cloth, etc
Yeah it would be nice to be able to 'erase' or 'erode' a material (with an effect or painting) and then see that opacity in the viewport. Generating opacity maps should be standard part of the export process too. This would be great for creating things like tattered cloth, hair, etc.