This happens in any application that I have tested it in. I can't figure out of its normal or not.
Here is the scenario. I have a 512x2048 texture and a 10m x 30m polygon. I unwrap the polygon and then quantize it so that it fills then entire 0-1 UV space. This means the texture should be perfectly mapped to full texture with NO distortion, yet, when I look closely at the lines I draw on the texture. All the vertical pixels produce texels that are much wider than horizontal texels.
Also as far as I can tell this happens on 1:2 textures as well just to a less extent. Meaning the issue is proportional.
I thought that it was fine to use power of 2 textures and that you wouldn't have any problems!
Can someone explain what's going on here?