nuclear@4: uniform sampler3D vol_tex;
nuclear@4: uniform sampler1D xfer_tex;
nuclear@4: 
nuclear@4: void main()
nuclear@4: {
nuclear@4: 	vec4 voxel = texture3D(vol_tex, gl_TexCoord[0].xyz);
nuclear@4: 	vec4 color = texture1D(xfer_tex, voxel.a);
nuclear@4: 
nuclear@4: 	gl_FragColor.rgb = color.rgb;
nuclear@4: 	gl_FragColor.a = 1.0;
nuclear@4: }