How to render fluid with high fps

[lyd405121]

Background

• Recently， I am working on a fliud simulation task using newton
• The simulation is perfect，but I don't know how to render all those particles in isaacsim/isaaclab correctly

franka-fluid-10x-40pct.mp4

My try

• I have several ways to do it

Surface reconstruction

• We can use surface reconstruction algorithm like marching cube or something else , make all particles into a mesh, then render it in isaacsim directly
• But performance will drop for two reasons:
• The reconstruction process can be slow
• The reconstruction result contain unkonw number of trianlge which can not use fabric array to speed up

Render Particle

• I have read some blogs about how to render fluid particle
• And I found it is easy to implement it

flui.mp4

• But it needs to write a shader using aovs like normal/psosition/thickness
• I don't know if isaacsim support it or how can I write my own shader for particles

Render volume

• If the simulation process can output a density field as a nanovdb
• I think it can be rendered by isaasim easily
• But animated nanovdb or 3d fabric array, it may not supported by isaacsim

Question

• What is the right way or fastest way to render fliud particles in isaacsim

[PeterL-NV]

Hi, are you looking for rendering fluid particles using PhysX? If so, please check this out Omni Particles
There're also some examples under Window -> Examples -> Physics Examples -> Particles that you can check out.
Hope this helps!

[lyd405121]

Cool!

• I will check this, seems promising

[PeterL-NV]

I am closing this, feel free to re-open if you need further help.