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#Actualsamoth

Posted 13 February 2013 - 05:59 AM

Noise function, or texture. Add to that a coverage map, which is more or less something like a very low resolution shadow map from above.


That way, you don't have snow under structures (say, a roof, tent, park bench) where people wouldn't expect to see snow, and you can even have footsteps or wheel tracks if you invest only a little more work.


If you're really serious about doing hardcore snow, you can not only change the color, but also extrude vertices upwards. This was described in Shader X4 some years ago, and looks quite cool even without modern bric-a-brac like tesselation (though that would probably add even more realism).

#1samoth

Posted 13 February 2013 - 05:58 AM

Noise function, or texture. Add to that a coverage map, which is more or less something like a very low resolution shadow map from above. That way, you don't have snow under structures (say, a roof, tent, park bench) where people wouldn't expect to see snow, and you can even have footsteps or wheel tracks if you invest only a little more work. If you're really serious about doing hardcore snow, you can not only change the color, but also extrude vertices upwards. This was described in Shader X4 some years ago, and looks quite cool even without modern bric-a-brac like tesselation (though that would probably add even more realism).

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