Zbrush will only display a flat shader. Help?

[Peeeetah]

So I was working as normal on a project of mine, when suddenly zbrush decides to only display a flat shader for everything. I don't believe I lost any of my textures or polypaint data, it just won't display anything but a flat shader on my tools. This is the first time I've encountered a problem like this. Any idea what's going on? I can't change the matcap at all. If I choose a different matcap nothing really happens. This is really frustrating.

[M1KES]

can you post a screenshot of the zbrush window?

[cryrid]

Check the Render palette to make sure it's not on flat. Chances are that's not the problem though if you can't see polypaint either.

Are you on R3?