vec3 sunColSqrt=vec3(SUN_R, SUN_G, SUN_B) * vec3(2.2) / 255.0;
vec3 sunCol    =sunColSqrt * sunColSqrt;

vec3 moonColSqrt=vec3(MOON_R, MOON_G, MOON_B) * vec3(2.2) / 255.0;
vec3 moonCol    =moonColSqrt * moonColSqrt;
