ZBrushCentral

problem with lighting

Hi,
I have this problem : whatever changes I make in the “light” menu, none of them seems to apply to the shape modified. I want to change the light direction, but it does not work. Is the program not working properly, or I am doing something wrong?
Thank you.

It sounds as if you have a MatCap material selected (such as the RedWax material). MatCaps have their lighting baked in so the lights in the Light palette have no effect. Select a different material, such as the Basic Material and then try adjusting the lights.