stayinwonderland Posted January 25, 2016 Share Posted January 25, 2016 I saw an artist post this on facebook today: giphy.com/gifs/PLeIJ9338S3SM his post said: "Went a bit into learning UE4 today, made a simple rock/snow material based on world position (no matter how the object is rotated, the snow will deposit ontop)." and I wondered if there was a similar material in 3ds max (I'd be rendering in something like Vray) that could do this. Not just the top/bottom material which I'm guessing would cover a certain percentage along an object's height, but something that always landed on top-facing parts? I would also use a 3d snow script too but right now I'm talking about materials. Link to comment Share on other sites More sharing options...
Josef Wienerroither Posted January 25, 2016 Share Posted January 25, 2016 (edited) A mix map/Blend material with a falloff map in the mix/blend amount slot. The falloff type set to towards away and its direction to world Z axis Using a sharp mix curve produces a distinct edge between snow and no-snow The world Z alignment takes care for the snow staying always on top, even when you rotate the object in question... You can use the mix map to mix materials or map. Even put some displacement in the snow material to give it some thickness. Though by the nature of the falloff, the displacement would only appear vertically heres a quick Max 2014 scene SnowFalloffMap.zip Edited January 25, 2016 by spacefrog Link to comment Share on other sites More sharing options...
stayinwonderland Posted January 26, 2016 Author Share Posted January 26, 2016 Hi, thanks for the tip. I found this tutorial which might complement the above quite well: superka-01.livejournal.com/1947.html He uses a gradient ramp and has the falloff as the sub-map, then uses noise in the gradient ramp so that the snow doesn't have a solid hard transition. Link to comment Share on other sites More sharing options...
Chris MacDonald Posted January 26, 2016 Share Posted January 26, 2016 You could (if you wanted to do it with geometry) go to the top view, select all faces with "ignore backfacing" enabled, detach those polygons and apply a shell & turbosmooth & noise modifier to them to create snow with a thickness on various branches Link to comment Share on other sites More sharing options...
beestee Posted January 26, 2016 Share Posted January 26, 2016 Peter Guthrie has a tutorial that talks a little about snow here: http://www.peterguthrie.net/blog/2011/06/twins Link to comment Share on other sites More sharing options...
stayinwonderland Posted January 27, 2016 Author Share Posted January 27, 2016 cheers, that's quite a good link. Maybe snow flow will work nicely on rocks too, that's my main issue, especially once I saw that cool UDK material linked above. Link to comment Share on other sites More sharing options...
stayinwonderland Posted January 28, 2016 Author Share Posted January 28, 2016 damn, snowflow is no longer available for free Link to comment Share on other sites More sharing options...
Chris MacDonald Posted January 28, 2016 Share Posted January 28, 2016 http://www.evermotion.org/tutorials/show/7892/making-of-snow Similar to what I proposed, but probably a little better (although a bit more to set up) Link to comment Share on other sites More sharing options...
beestee Posted January 28, 2016 Share Posted January 28, 2016 Just saw this on CGP, using particle flow: https://vimeo.com/153341116 Link to comment Share on other sites More sharing options...
stayinwonderland Posted January 28, 2016 Author Share Posted January 28, 2016 cheers guys, I shall look into those and report back tried the selecting polygons trick and it looked like an amateur joke, but then saw the above tutorial used the relax modifier (my selection looked jagged and just didn't look remotely realistic). Link to comment Share on other sites More sharing options...
stayinwonderland Posted January 28, 2016 Author Share Posted January 28, 2016 damn, well that particle system is out because it's not compatible with my version of 3ds max. Link to comment Share on other sites More sharing options...
Josef Wienerroither Posted January 28, 2016 Share Posted January 28, 2016 damn, well that particle system is out because it's not compatible with my version of 3ds max. Which Max version are you using ? I think Max 2013 Extension was Particle Toolbox 3 - which are required and would make it the minimum version requirement for the dataset operator... Link to comment Share on other sites More sharing options...
stayinwonderland Posted January 28, 2016 Author Share Posted January 28, 2016 yeah, I'm on 2012 Link to comment Share on other sites More sharing options...
Josef Wienerroither Posted January 28, 2016 Share Posted January 28, 2016 Thats too bad ... It's indeed a great little system - i love the interactivity it provides Together with a fast particle mesher like pwrapper or frost i bet it can produce nice looking thick layers of snow.... Link to comment Share on other sites More sharing options...
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