cubemap lod blocks compiling with openGL

That's interesting! I've tried getting it to work, without success before (Which is why OpenGL is blocked when you connect it)

I presume this will work for tex2d mips as well?

I didn't try to manipulate tex2d mips yet so I didn't test the fix on it.

So, essentially, branch on SHADER_API_OPENGL and make sure to add #pragma glsl.

I'll try it in a bit! Currently working on getting all the features in now for the first beta release, will try and fix as many bugs as possible during the beta.