Factorio Forums

The lava Shader produces 2 pixel wide artifacts due to breaking screen space derivatives for the texture sampling. This is happening due to handling texture wrapping in the shader instead of relying on the sampler

Thanks for reporting this issue. The texture contains 8 tiles which we randomly pick from in the shader, so we can't rely on the sampler. I think it's not worth our time to try to find a workaround, so I'm moving it to "Won't fix".

This issue is fixed for 2.1. We have implemented array textures support to our graphics engine, so we don't have to compute tile UV coordinates in the shader now.