Miniature Foliage Trees change colors and LOD when i'm near them.

I’m Rendering animation of little architectural model. I’ve exported these trees from 3ds max and scattered with foliage tool. As i see they change color when camera goes near them. Foliage Cull distance has also some kind of influence on their color. First 3 images are showing how trees change color when i’m working in viewport. last 2 pictures are cinecamera screens when it goes near. (First frame 544 second frame 545)

I hope you can help me with that. Thank you ahead!