Why does the same material look differently on two almost identical models? Weird lighting behavior?

I have two rock massives. Both have identical material. Vertex colors. UV maps. Yet they both look differently, there’s a noticeably contrast that doesn’t go away even if those two models are merged together.

When turned upside down, situation is reversed. Object that appeared darker is now brighter and vice versa.

I suspect it’s some scene setting I don’t know about or just EEVEE’s own “feature”? Please, let me know. I’d like to get same look for all my objects. This just looks weird to me.

Turned 180°

Does this still happen if you remove the material? That’s going to tell you if the problem is in the materials or the scene.

I think we need to check the direction of the face normal first.
And try using monochromatic colors to see if they’re having the same problem :thinking:

Inverted normals on one was my immediate thought, too.

Normal are… Normal. Used to be blue by default prior to 4.4 I think. flipped remained red.

Looks like something’s wrong with the material after all. Simple color works fine.

Is there a normal map in the material? Is it set to non-color and is it connected to a normal map node?

That material has several bump maps mixed together and 3/4 were set to sRGB instead of non color. I didn’t create that material, otherwise I wouldn’t have this problem. But I didn’t realize I should check this after someone else.

Thanks!