I have two very similar assemblies. Parts in each assembly are in the same position.

Scene is the same, lights also the same, render options identical (brightness, reflectivity and so on).

But renderings of both assemblies are different, one is very clear and good, second is darker, like "foggy"? Please look below.

Why? Did I missed something? Can I transfer all render parameters (scene, lights) from assembly A to B?