nuclear@1: uniform sampler2D tex;
nuclear@1: 
nuclear@1: varying vec3 vpos;
nuclear@1: varying vec2 texcoord;
nuclear@1: 
nuclear@1: void main()
nuclear@1: {
nuclear@1: 	vec4 tex = texture2D(tex, texcoord.xy);
nuclear@1: 
nuclear@1: 	float fog = clamp(40.0 / (vpos.z * vpos.z), 0.0, 1.0);
nuclear@1: 
nuclear@1: 	gl_FragColor.rgb = tex.rgb * fog;
nuclear@1: 	gl_FragColor.a = tex.a;
nuclear@1: }