Hello,
I just noticed normal maps on glossy surfaces look wavy after I have moved the project to 4.12. Have I missed a note or something?
Post a picture, there’s lots of different issues this could be describing.
The bigger waves are expected as it’s a sand texture normal map. The problem is the smaller waves you see in the red circles. All normal maps show these artifacts.
That looks like normal map compression artifacts. Try opening up the normal textures, choosing some different variants for formats, and re-compressing, and see how it changes.
I’m a little lazy, there’s a ton of normal maps. Looked fine in 4.11. Not sure what’s wrong 
I will create a new normal map and see how it looks when imported.
Hmm… This almost looks like Epic reduced the bit range of the normal calculations in the deferred renderer. Possibly to make way for new shading models without impacting performance. Don’t quote me on this, it might not be the problem. But I noticed on smooth slopes on my landscape I get significant stepping, almost like a crystal. It could be a number of things.
Thanks. It’s mentioned that
Does that mean we’re now gonna pay more for having smooth normal maps or the cost is only going to become the same as in versions before 4.12 ?