Shader applied? how to disable

Hi guys, please take a look at the screen. In light parts, the static mesh looks ok but in dark there is strange shadering/shader?
No PostProcessVolume’s materials applied for sure.
Does anyone have any idea?
Thanks!

It will probably mean the UVs are shot. Is this an asset, or did you make it exteranally and import?

It is an asset, static mesh.

Can you also do a slightly more zoomed out view? ( it’s a little hard to tell ).

Attaching with lower quality with zoom out + 1 more from inside a room

I don’t know what the second problem is, but the first looks like aliasing.

Have you turned on anti aliasing?

346432-screenshot-3.jpg

Yes, TemporalAA is set on.
This is strange because it happens on 1 level only…

It looks like low-quality SSAO or SSGI. Also it could be causes by wrong shadow biases from light sources. Try to adjust it.

You can try run commands “ r.AmbientOcclusionMaxQuality 0” or “ r.SSGI.Enable 0” to check it.