When i use standard rendering image appears as red, green and blue in absolutely greyscale scene. https://clara.io/user/kamenenator. I've checked my settings and there's nothing indicating this kind of result.
We're looking into the preview error. As it stands, the colours only affect the image preview and have no impact on the scene itself.
All the best,
Kiefer from Exocortex
Now i see that it's only the preview, but it was happening in the viewport. Anyway, thanks for the help:)