chloegravy Posted October 2 Share Posted October 2 It's been hard getting support from the Houdini community on this topic. I'm not sure if the solution to my problem is obvious, or if it's too much of a headache to explain the solution. Either way, this forum is my last hope. I'm trying to simulate a small scale breach—think head coming out of a tub of water. Right now I'm in the RND stage, so I have a simple flat tank setup with a colliding sphere that has an animated mountain noise. Everything is stable when running the sim on a single machine, but when I slice it up and send it to the farm I start to experience volume loss in the tank. I'm assuming it has something to do with the particles being transferred between computers and in turn the attributes become unstable, this is just a guess though. If this is the cause, I wouldn't know how to fix it since my knowledge on distributed sims is limited. The screenshots I've attached show the difference between running the sim on the farm vs a single machine. I only ran the sim to frame 14 in order to get quick results. The actual flip object and solver parameters have not changed between each screenshot, the only difference is whether it's distributed or not. Screenshot 01: Distributed Simulation Screenshot 02: Non Distributed Simulation ALSO, when watching the masterclass on setting up the distributed simulations for FLIP, I noticed that the "Create Boundary Layer" option is manually disabled. I've followed this in my workflow, but technically I need my tank to behave as if it were "infinite", so should I keep this on? Maybe not. Either way I ran a test with it enabled just to see what happens. I don't normally work with tanks when using FLIP so this is a learning experience as well. My results are shown in the screenshot below. You can see that the padding doesn't sink, which makes sense I guess... but the active simulation still sinks. Screenshot 03: Distributed Sim with Boundary Layer enabled Screenshot 04: Distributed Sim with Boundary Later enabled - top view This was probably too much info, but I'm trying to be thorough in order to pin point the issue. I can provide the .hip file as well for those who want it. Any help/insight is appreciated. I'm open to any tips and tricks as well, thanks! Quote Link to comment Share on other sites More sharing options...
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