Weird Black Walls w/ Homecrafters

[dragonfly]

I've been searching fot 2 days and have not found any thread that can help me. I am having issues with homecrafters. I can make walls and floors fine one minute, then I will change the color or do a whole new wall and the next time it will be blacked out. I do not change anything besides the color or whatever, all other steps and stuff are the same.

Does anyone know why it is doing this and how to fix it?

Thanks for any help..