susu2k Posted October 20, 2022 Share Posted October 20, 2022 I'm trying to replicate this effect to learn. I've attached the ref and my flipbook. Feels like I'm close from a setup perspective? Wondering what I could do differently so it feels more sandy. I'm using a flip sim advected by a AA Flow Noise Velocity field. Somehow I don't get the same "sandy" look. Any ideas how to get closer? sand-flip.mov sand-ref.mp4 Quote Link to comment Share on other sites More sharing options...
Xite Posted October 21, 2022 Share Posted October 21, 2022 Isn't vellum grains or even pop grains better for this use case? Quote Link to comment Share on other sites More sharing options...
susu2k Posted October 21, 2022 Author Share Posted October 21, 2022 Is it? I find I can’t advect sand with forces easily without the whole sim goings nuts. Also sand is much slower than flips no? Quote Link to comment Share on other sites More sharing options...
susu2k Posted October 22, 2022 Author Share Posted October 22, 2022 any ideas? Quote Link to comment Share on other sites More sharing options...
fencer Posted October 22, 2022 Share Posted October 22, 2022 Looks like you're on the right way with flip, do more resolution, add more swirl/turbulence as on ref. To make it more sandy for render you can try advect pop with amount of particles required for this look or random remove part of particles like 20-30% from flip to make gaps between grains. Quote Link to comment Share on other sites More sharing options...
Joon Ref Posted October 25, 2022 Share Posted October 25, 2022 On 10/22/2022 at 12:43 PM, fencer said: random remove part of particles like 20-30% from flip to make gaps between grains. Does this really make a difference in the look of the sim? Genuinely curious on the approach and why you feel it works. Perhaps its the randomness that gives it that natural feeling? Quote Link to comment Share on other sites More sharing options...
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