Hey all
I'm trying to get some volumes to grow in size according to their age, from newborn small to old large. Is there an expression I can type into the voxel size parameter that will “just work”?
I've used particles to build my volumes, so we can work with particles here.

I've got a mathematical expression that i can apply to my problem, basically fixing it. my only problem is that I can't access the $age variable in the vdb from particle voxel size parm. do you guys know how to transfer local variables so that i can access my particle lifetime?

The size of the voxels must be the same for the *entire* volume.

edward
The size of the voxels must be the same for the *entire* volume.

so you're saying its impossible?

If you want the size of voxels in the same volume primitive to be different, then yes, that is impossible.

You can fake this:

edward
If you want the size of voxels in the same volume primitive to be different, then yes, that is impossible.

i was able to do it using pscale. not impossible.

I think you're confusing “voxel size” with “number of voxels corresponding to a particle”.

A great way to analysis Vdb is with ‘Vdbvisualizetree’ node. It allows you see the volume structure quantifiably.