nuclear@18: void main()
nuclear@18: {
nuclear@21: 	vec3 pos = gl_TexCoord[0].xyz * 2.0 - 1.0;
nuclear@18: 
nuclear@21: 	float len = length(pos);
nuclear@22: 	float val = 0.1 / (len * len);
nuclear@21: 
nuclear@21: 	gl_FragColor = vec4(-pos / len, val);
nuclear@18: }