davide445 Posted February 6, 2021 Share Posted February 6, 2021 (edited) Looking since some time how to realistically sim volumes of snow moved by objects (vehicles), with the ability to change his properties (I.e. wetness, density). I've seen lately Vellum (improved PBD solver) used for this kind, but my humble testing didn't see any way to realistically simulate other than dry snow. The "old" POP Grains (original PBD) seems also limited to a few choices. Using FLIP or SPH solver might result in more flexible results with a lot of custom work to be done, but so far the more complete solution (realism + flexibility) I have learned about is MPM. MPM is available out of the box in Bifrost, in Houdini I only found an Azmisov 2015 old third party solutions that will sure never work on 18.5, another 2015 tutorial from cmivfx using VEX either probably not working anymore. So just wondering why there is so little love for this kind of solver (that can be used for many other kind of sim other than snow) in Houdini, or if I miss some point so that maybe it's really not needed for my goal. Edited February 7, 2021 by davide445 Quote Link to comment Share on other sites More sharing options...
bunker Posted February 7, 2021 Share Posted February 7, 2021 Why not use Bifrost, don't you like Maya? Seriously though, SideFX adds so many amazing features in every half release that I would excuse them for not spending much time on an MPM solver. From the little I know about MPM, it's very slow. Also, most FX tasks are not snow or gooey simulations that would require MPM. 1 1 Quote Link to comment Share on other sites More sharing options...
davide445 Posted February 7, 2021 Author Share Posted February 7, 2021 (edited) Will finally test on Maya since seems there are no other options, will need to start from scratch since never used it. Looking at research papers there are applications where MPM work in real-time (faster than PBD), so I suppose it's not necessary slower than other solvers, even if I suppose this can be a very special case. MPM can be used in many kind of sim for granular materials, thin objects and fibers but also soft objects with breaking parts etc and more in general any large deformation, contact and fracture problem. There are even GPU implementation of the method so I suppose something innovative can be made with it. I'm not complaining SideFX can do what it want, just trying to understand. Edited February 7, 2021 by davide445 Quote Link to comment Share on other sites More sharing options...
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