// fragPos is in clip space, lightPos is (2,2,2), and pointDepthMap is a samplerCubemap
float pointShadowCalculation (vec3 fragPos, vec3 lightPos) {
	vec3 fragToLight = fragPos - lightPos;
	float closestDepth = texture(pointDepthMap, fragToLight).r;
	closestDepth *= farPlane;
	float currentDepth = length(fragToLight);
	float bias = 0.05;
	float shadow = currentDepth - bias > closestDepth ? 1.0 : 0.0;
	return shadow;
}