I am experiencing strange issue, while rendering textures under certain angle. Details are cut in the part of one face, one part looks normal, the other one always further from camera, seems to loose much of its details. It is classic lambert material with bumping and the color is connected to contrast, but both nodes has no effect on result when I disconnect them. I thought it might be caused by sampling, but I used very high rendering details and still same effect. So maybe it could be something with mipmapping, but don't know, really have no clue, anyway I was not able to find something related to this issue on google, so I am asking there. Thank you for response.
From the bad angle:
from the good angle: