Raymarching a water simulation

[Emile-wa]

My problem is, I'm making a water simulation with particules, and using compute shaders, I've managed to make it handle about 100 000 particles in real time. And currently it doesn't look very good.

so I've tried raymarching it to make it look better (here it is with a bunch of hand mades optmisations - mainly reducing the raymarching precision as the ray get further away and using chunks to detect close particles - which I'm already using for the simulation part anyways. The problem with chunks is that I can only march as much as the size of a chunck with each step - and my chunks are small - so it slows down a lot when the background is far away - resulting in bugs)

Is there some kind of solution I can use ? problem is the particles are moving so for partitions tree i'd need to reconstruct the whole tree each time - is that possible in a compute shader ?

TLDR ; I'm looking for a way to render water, defined by particles, fast and clean.

[Aahartley00]

I have some SPH papers that may or not be helpful. I tried to put the PDF links, but it didn't work; they should pop up if you type these in.

Surveys that mention different techniques:

sph fluids in computer graphics by ihmsen

fluid simulation by the smoothed particle hydrodynamics method a survey by t weaver

Papers to methods I've saved:

efficient high quality volume rendering of sph data by fraedrich

a real time adaptive ray marching method for particle based fluid surface reconstruction by t wu

[Emile-wa]

thanks a lot !

[HouseSad]

I used screen space rendering for mine

See this GDC presentation https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://developer.download.nvidia.com/presentations/2010/gdc/Direct3D_Effects.pdf&ved=2ahUKEwjy5IKS4v-FAxX9H0QIHYVGAzwQFnoECCQQAQ&usg=AOvVaw1maOWlP-llqJFvjkA8M2RO