I use instance mode.
I can't send the problematic scene - it's large and has a lot of comercial models. I tried to reproduce this problem in smaller scene.
It seems to me that the problem somehow connected with car models because with another objects instead of that cars everything looks OK. In attachments you can see that color combination on spheres depends on visibility of the cars (renderable/not renderable) and it doesn't matter what material these cars have... These cars are proxies. Models have been bought from Evermotion so I don't have rights to send them unfortunately...
On all those pictures spheres have the same material with CoronaMultiMap in Diffuse slot, I didn't change anything in that material making renders.
Changes happen in regular rendering everytime when cars are renderable/not renderable. In interactive rendering mode changes not happen if I switch renderable/not renderable while it renders, but if I stop the render, switch renderable parameter and start IR again, it renders new combination of colors.
