vex volume procedural not working on points.

[anupamd]

I tried to follow Scott Keatings foam shading tutorial exactly for rendering points as volumes using the vex volume procedural.

 

But it does not work for me and I cant figure out why.

Could someone take a look at my hip file and see what im doing wrong? (ps: in trying to render flip foam with this technique)

 

 

[anupamd]

oops.. here is the hip file.

uniformvolproblem.hip

[anupamd]

Also, I it does work if I create a volume with the points (eg: via volumerasteriseaspoints), etc.. but I do not want to do this step as it is very slow for millions of particles.

As per scott keatings tutorial, you just need the points and the shader to render each point as a spherical volume blob, and that is what I am interested in. 

[anupamd]

Anyone? Is no one using uniformvolumes to render points for stuff like foam for your flipfluid sims?

[lucienfostier]

Hi anupamd,

 

here is a simple hip file to setup rendering any polygon ( points includes) as volume in Houdini.

 

The key element is the vop shop properties node with the extended parameter, uniform volume, which forces Houdini to evaluate the geometry as volume and shade accordingly.

 

feel free to ask if any question

 

Cheers

 

Lucien

uniform_volume.hip