I have a texture that uses a Rectilinear Grid. I managed to do it with color curves, but the method has some issues which I don’t know how to fix.
See here left a normal linear grid for a test texture and on the right side the same texture with a rectilinear grid. Notice that the center is very small and the edges are exponentially larger, but rectilinear girds can have arbitrary sizes.
Here is the material graph for the rectilinear UVs.
The problem comes up if you scale up the resulting material to large sizes. Here with a 2000km cube, but it shows up at smaller scales too. Notice that there are clear segments in the texture that do not get interpolated. I want to get rid of these rectangular artifacts.
Things I tried to fix the square artifacts, but did not work:
- Any color curve produces the same artifacts
- Increasing the resolution of the Curve Atlas does not affect the artifacts either.
TLDR: Using color curves for UVs creates artifacts at very large sizes. How do I get rid of them but keep my custom UVs?