Bug / Crash Fluid ignores colliders on certain amount of particles (compute backend)

[JulijaF]

First off, I just want to say how amazing Obi Fluid is! I've had so much fun creating various liquids for my projects—huge thanks for the fantastic work. Keep it up! 

The Issue:
I initially ran into an issue with the compute backend struggling when handling a large number of colliders in the scene. The fluid wouldn't collide with anything, but I found a fix on the forum by adjusting:

Code:

#define MAX_CONTACTS_PER_SIMPLEX 32 → 512

This resolved the problem, but only up to a certain number of particles.

My Setup:

• Colliders: ~150 (mostly Box Colliders), positioned close together.
  
• Fluid Resolution: 3
  
• Particle Count: Around 185k particles—at this point, the fluid starts ignoring colliders and becomes jittery.
  

The Problems:

1. Instability at High Particle Count
   • Even with a high-end GPU, the compute backend becomes unpredictable when the particle count increases.
     
   • Reducing the resolution only delays the breaking point.
     
2. Collisions Causing Jitter
   • The fluid behaves erratically when colliding with many objects, even with particle count around 100k.
     
   • This jitteriness leads to excessive foam generation.
     

Example Demos:

1. Jittering Fluid at High Particle Count 
   demo
   
2. Fluid Passing Through Multiple Colliders
   demo
   

Would love any insights on improving stability and handling high particle counts effectively. Thanks in advance! ?