+" vfrag = mix( vfrag, do_light_diffuse( vfrag, qnorm ), 0.5 );\n"
+" //vfrag = do_light_spec( vfrag, qnorm, halfview, 0.1 );\n"
+" vfrag = do_light_shadowing( vfrag );\n"
+" vfrag = apply_fog( vfrag, fdist );\n"
+"\n"
+" float opacity = clamp( fdist*fdist, 0.0, 1.0 );\n"
+" oColour = vec4(vfrag,opacity);\n"