Zbrush 4R7 - Material is shown as flat grey

Krater

Hi!

I'm having the problem in 4R7 that my model is shown as flat grey. I've tried color>fill object with "M" or "MRGB" checked, and I'm rendering in "Preview" mode. In my subtool palette everything seems alright.

I've attached a screenshot:

Krater

A friend gave me the solution. I hade to merge my subtools and "auto group" them. After that I split them based on groups. This finally fixed the problem.