I’m a bit confused here - I mocked out a scene using a 1K version of a texture and it appears to UV map fine. However, when I then swap the textures out to the 4K version of the same texture, the shading appears all “sharp” (also the roughness etc is way altered).
What’s causing this? Re-UV unwrapping doesn’t do anything, and I’ve tried combinations of auto smooth normals/weighted normal modifiers etc. Why would the same texture work fine at 1K and not at 4K? I can’t see anything wrong with the actual texture either when opened in a graphics editor.
Any ideas how to fix the shading for the 4K?