glow (incorrectly) warns about unset image-load-store uniforms
Example: uniform layout(rg16f, binding=0) writeonly image2DRect uLUT; yields the warning: "Uniform `uLUT' is used in the shader but was not set via GLOW. [Program 55: glow-material/precalc-env-brdf-lut.csh]"
However, according to https://www.khronos.org/opengl/wiki/Image_Load_Store, "These are usually set with a binding layout qualifier, but they can also be set with glUniform1i or glProgramUniform1i."
Anyway, directly using the (allowed) "layout way" might also create glow warnings.