Hi BlackJack,

I think I found the problem, my camera clip near and clip far were set wrong (1 and 2000). And I noticed it was for other models with a normal map too. For some reason it showed only flickering errors for models when in combination with a normal map material and shadows on (whether shadowmapping or stencil didn't make a difference).

Here is another shot of the error, just incase other people have something similar: