For no reason that I can see the shader files just out of the blue stopped working. Shader file has the same name as the map, is in the default_shader / shader file list, and is connected to netradiant correctly. However, I just got on netradiant and it's just not working. Never had this problem before, what could cause this? No errors in the terminal either.
Silly little mistake and a quick fix. Don't make the shader name the same as the texture name