Houdini 13 riverbed upres. Particle multiplication tests for FLIP. Here's an approach that uses DOPs for a particle multiplication effect.
The advantages to doing it in DOPs are: - the GasAdvect DOP is faster and more accurate than the AdvectByVolumes POP - handle collisions roughly the way FLIP does - support emitters - support closed tanks - staying in DOPs is faster than doing anything into POPs In general it should take longer to draw the results of this setup than to "solve" it. This uses the lo-res surface field to stop too many particles coming from the emitters, just as it works in the lo-res sim, but it's not really accurate enough at hi-res. Particle multiplication tests for FLIP. FLIP smorganic/sheeter effect? - Page 3 - Effects - od. FLIP smorganic/sheeter effect? .: Houdini 13 Flip wedges :.
.: Houdini 13 Flip wedges :. .: Houdini 13 Flip wedges :. "ILM went even further than this – they modeled the way the air was affected by the water splashes which in turn affected how the water was coming off the waves and splashes as mist and how that mist moved, and how the actions aerated the water and created white water.
This is an outstanding level of realism. “The real selling point or tipping point was when we started building air simulations around all these events,” comments Cofer. “We used our Plume tool, which is our tool for doing smoke and fire simulation. It gives you very detailed air simulations. If you have a ship that breaches up through the ocean, it churns up the water, and there are all these vertices of air rotating under the wings – as it spreads its wings apart, as you go through the evolution of a water droplet, you start with a surface of water, which is meshed, and then splashes, and that atomizes to mist.
Cloudy/Murky Liquid. FLIP simple texture reprojection. Setting up a simulation farm. The simplest way to do this is to ssh into another machine and run hbatch with the name of the hip file, then render the appropriate rop output driver.
The second simplest way is to write a .cmd file (text file) which opens your scene, and render the rop output driver.. something like "myfile.cmd": mread <myhipfile.hip>render /out/geometry1 then run hbatch like so : hbatch -v myfile.cmd if you want to split it onto multiple machines you're going to have to get much more involved and read the .pdf by Jeff Lait on splitting fluid simulations onto multiple machines: I don't think this applies to particle fluids.. just volume fluids .. not sure).
Sand blowing over sand dunes. Water inside of air field - Finished Work. FLIP pressure projection - threading issues. I've been trying to boil down the optimal performance settings for FLIP simulations, and I've come across a difficult trade-off when it comes to the pressure projection part of the solve.
Running on a dual-socket, 16-core workstation, all other parts of the solve tend to make great use of the full core count. With the preconditioner option on, as expected, it drops to a single core but gets there in the end. With the preconditioner option off, it will get to about 75% CPU usage, and actually takes almost the same time, maybe a hint longer... also expected. The significant thing here is, if I launch Houdini with affinity constrained to 8 cores on a single socket, and 8 threads, the pressure projection with preconditioner off uses 100% CPU on that socket, and completes in around two-thirds of the time... a full 50% speed increase while only using half of the machine. FLIP leaks through collision geo container - Gatorade Shower Test. Just got a chance to look at this...
You've got a thin collision object with very fast movement, which is very challenging for a fluid (liquid) solver. The main thing to think here is substepping. Basically you need to give the solver a chance to see as much of the collision motion as possible, which means it needs to solve multiple times per frame, i.e. more than the default of 2 substeps. Elastic effect on flip fluids on H12. That setup looks good for strain.
The only big thing missing is the strain isn't being rotated by the velocity field. So if you have a blob that is stretched in X, then rotated 90 degrees, it will still try to restore along the X axis. Gas Velocity Stretch is supposed to fix this, but it is a pretty subtle thing. It's also a bit not-FLIP like because you are keeping a field from frame to frame. Boundry conditions within FLIP using SDF or fields.
Hey Everyone I'm looking for a solution to define or a free-slip boundry condition. defined here.
Elastic effect on flip fluids on H12. That setup looks good for strain.
The only big thing missing is the strain isn't being rotated by the velocity field. So if you have a blob that is stretched in X, then rotated 90 degrees, it will still try to restore along the X axis. FLIP auto resize tool.