So, I decided to make a terrain with some realistic textures from ambientcg.com, and I created a terrain material with those textures.
But when this material is viewed from afar, either from on the terrain or a flat plane, the material looks very, very noisy, almost like it’s being path-traced. You can’t see it well in a picture; only when the camera is moving. Temporal anti-aliasing somewhat fixes the issue, but not very well.
Here’s without TAA:
Is there a better way to fix this? The textures are all 2K.