Eric Reed
ereed3d
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Guided Ocean Layer having issues with particle scale 2026年1月14日18:44
Hi everyone,
I am using the guided ocean layer shelf tool trying to get a boat to go through some waves. If i have the particle separation above 0.2 everything looks good, except low res. When i lower to the particle separation it looks like the simulation is being swallowed by the guiding ocean and i lose all wake from the boat in the trough of the wave.
i've tried following 3 different tutorials at this point. none of them mention anything about issues upresing.
the high in this is 0.08 and the low 0.2 in the example mp4's
any help with this would be appreciated.
thanks!
houdini 20.5.550
AMP Threadripper 7960x
RTX 4090 x2
256 gb ram
I am using the guided ocean layer shelf tool trying to get a boat to go through some waves. If i have the particle separation above 0.2 everything looks good, except low res. When i lower to the particle separation it looks like the simulation is being swallowed by the guiding ocean and i lose all wake from the boat in the trough of the wave.
i've tried following 3 different tutorials at this point. none of them mention anything about issues upresing.
the high in this is 0.08 and the low 0.2 in the example mp4's
any help with this would be appreciated.
thanks!
houdini 20.5.550
AMP Threadripper 7960x
RTX 4090 x2
256 gb ram
Vellum grains explode on high resolution 2022年5月19日21:42
Hi,
This is my first post, and I am a relatively beginner in Houdini.
I am trying to do a simple sim of a logo rising out of a pile of sand. My first attempts were with the pop grains shelf tool, but this didn't work. there didn't seem to be a way to have a different friction per collider, i.e. the ground to have high friction so the sand will not end up totally flat, yet no friction on the logo so the sand wouldn't stick to it. changing the friction, or friction scale on the static objects does nothing. The only thing that would make any change at all was to change the dynamic scale in the pop solver, but that effected everything globally. I'm gonna say it's a bug and needs fixed.
I moved on to trying vellum grains (fixed the friction issue, confirming it's a bug with the pop grains), everything was set up and working well enough with low res tests, so I increased the resolution down to 0.008 (where I thought it looked nice), but after the initial settle everything started to explode. think like pop corn. not all at once, but each grain would eventually decide to "pop"
tried to lower the resolution to .01 and the same thing happened(see attached video).
I have tried increasing the particle repulsion up to 1e+10, increasing substeps, and constraint iterations. none of those made any difference. is it another bug?
Houdini Indie 19.0.589
windows 11
1050x 16 core threadripper
128 gigs a memorey
4x a4000 videocards
This is my first post, and I am a relatively beginner in Houdini.
I am trying to do a simple sim of a logo rising out of a pile of sand. My first attempts were with the pop grains shelf tool, but this didn't work. there didn't seem to be a way to have a different friction per collider, i.e. the ground to have high friction so the sand will not end up totally flat, yet no friction on the logo so the sand wouldn't stick to it. changing the friction, or friction scale on the static objects does nothing. The only thing that would make any change at all was to change the dynamic scale in the pop solver, but that effected everything globally. I'm gonna say it's a bug and needs fixed.
I moved on to trying vellum grains (fixed the friction issue, confirming it's a bug with the pop grains), everything was set up and working well enough with low res tests, so I increased the resolution down to 0.008 (where I thought it looked nice), but after the initial settle everything started to explode. think like pop corn. not all at once, but each grain would eventually decide to "pop"
tried to lower the resolution to .01 and the same thing happened(see attached video).
I have tried increasing the particle repulsion up to 1e+10, increasing substeps, and constraint iterations. none of those made any difference. is it another bug?
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Houdini Indie 19.0.589
windows 11
1050x 16 core threadripper
128 gigs a memorey
4x a4000 videocards