Help with dark object in zbrush


I just started sculpting in Zbrush last week. Suddenly i must have clicked something, and my whole model is dark. It looks like it is masked, and i cannot see any masks on it, but even when i clear masks, it does not work, and the invisible masks do work on it. I filled it with solid color material, white RGB, and it is still dark. Does anyone know what else it might be? I am on the end of my beginner ropes here :frowning: