Gonna add my own 2 coins
michaelmoroz.github.io/TracingGeode...
www.shadertoy.com/view/ftBGWm
rantonels.github.io/starless/

Yeah I was aware of iResolution, I just never used the z component, but I guess I should still add it for compatibility.
Mouse zw has no equivalent in Compute toys, so that needs to be added in the first place.
Texture mipmaps for the pass-in/out buffers are not computed unfortunately

Of course there are still some minor differences:
* matrix multiplications are not a*b but mul(a,b)
* no GLSL texture types like sample2D / etc
* there are no "Shadertoy" channels, you need to resetup them to use absolute indices of the pass_in/out buffer

I mean its just SPH, its not *that* difficult

No, its written by me, that's why I can not answer your question easily.

uhhhm, shadertoy?

The answer to this will require a whole new blog post I'm afraid...

I've also tested out using it for nontrilinear stuff as well as volumetric integration
shadertoy.com/view/w3sXzf
shadertoy.com/view/t3sXzX
shadertoy.com/view/t3lSzf

I've also finally implemented sorting of the simulation particles, gave quite a nice performance boost (around
3-4x)

till surprising to me just how fast this turned out to work, my older attempts at ray tracing density isosurfaces were horrifyingly slow, and on top of that less accurate too, as it was just constant step ray marching.

The paper was about tracing SDFs but you can apply it to any isosurface of an interpolated 3D volume, like the liquid density.

The Nvidia paper from above also shows how to optimize those intersections quite significantly, giving a fast way to get the coefficients of the cubic as well as how to solve it quickly (would be great if it wasn't patented by Nvidia tho heh...)

The ray tracing algo is essentially a 2 level sparse DDA ray marcher which finds voxels with the liquid isosurface passing through them. When its found, a trilinear surface patch ray intersection is performed (solution to a cubic equation shadertoy.com/view/tlycDK)

still better tho (or maybe its cause im twitter blue or whatever)

P.S. the (arguably cursed) mip map prefix sum method
github.com/d4rkc0d3r/Co...

But other than that its very similar to my old VRChat fluid sim, except now I can have proper separate particles with their own data that isn't lost (like color in the video)
(also I no longer use Custom Render Targets (they are cursed))