I’ve got a model I created with Maya, with clean UVs and no history left or anything. But I keep getting these annoying spike artefacts on the texture when I create a Normal Map or a polypaint texture.
Note: that big white blob isn’t the problem, that’s just an area that I masked and didn’t want to colour. It’s those massive skewers that cause the problem.
It looks like your UV’s aren’t entirely within the 0,0 to 1,1 range. As a result, some points are getting pulled across the model because they’re being read as being in adjacent UV spaces. When laying out your UV’s it’s always important to keep a small buffer zone around the edges of each UV space. Not all programs register the 0,0 origin the same, and so points that lie on or extremely close to the edge of the UV space can be misread by another program.
Thanks guys. I’ve solved the problem now, but it was because of something completely unrelated. I had a few n-gons in my model, and I converted them to triangles rather than quads and triangles. This caused the problem for some reason.