Improve texture quality?

Any chance to improve texture blending quality?
Im use visibility based blending. and it Blend all in a strange way with lot of dirt and no smooth transitions. :evil:
And also will be good to have some interpolation/filtration cause I see pixels aliasings and its rude.

Dear Yegor,
thank you for the post. It is hard to say from the single image. Would it be possible to send me the dataset so that I can check it? Thank you.