glslangvalidator -V offscreen.vert -o offscreen.vert.spv
glslangvalidator -V offscreen.frag -o offscreen.frag.spv
glslangvalidator -V quad.vert -o quad.vert.spv
glslangvalidator -V quad.frag -o quad.frag.spv
glslangvalidator -V scene.vert -o scene.vert.spv
glslangvalidator -V scene.frag -o scene.frag.spv