Trying to create normal from DDX and DDY but i get point and line like artifacts. The artifacts are almost a grid like pattern and change as i move the camera closer or farther away… in no way smooth or useable…
I have been following youtube videos and trying nodes like PreparePerturbNormalHQ->perturbNormalHQ…
all seem to have the same problems and i dont know why. Im attempting it on relatively low res textures i painted on meshes for in unreals texture paint on mesh tool for nanite meshes.
Any ideas what can be done? I just need a normal map from a heightmap without the extra texture lookups / instructions.
Here are screenshots…
