Help Obi fluid collision

[JskT01]

Reducing the maximum allowed timestep to the same value as the fixed timestep will only allow Unity to perform one physics step per frame, at most. This can result in slow-motion physics if your frames take longer than 11 ms to render.

There's no sure-fire way to fix this, except improving performance. Which takes us back to the original issue: there's no way iterating through all particles once per frame (what your script does) will take 38 ms/frame.

Can you share a screenshot of your profiler?

proffiler here is the capture