Javier Verdugo


About Me



Recent Forum Posts

Generate velocity from volume Nov. 7, 2017, 8:08 p.m.

Hi guys,

sorry for my dely on the reply… Today internet was offline in the office. Thanks for your replys.

You cant generate a vel from just the fog volume, it makes no sense. You will need the original particles with a v attrib already calculated then just add the v attribute on the VDB From Particles node, or use a volume velocity node to create the vel from your points.

Ok I see! thanks

Now I have another problem, I have create vdb from particles, I add the velocity att here, then I connect a cloud noise but the velocity is lost here… I suppose this node is incompatible with this workflow right?

One of the features announced in 16.5 is volume optical flow, which can compute a vector field from a sequence of volumes or images.

Wow! that's sound amazing. Is there a tutorial to see how to use it properly?

Thanks for the info!

Generate velocity from volume Nov. 6, 2017, 5:40 a.m.


I have generate an particle animation and converted into fog with VDB from particles. I would like to generate velocity inputs of each voxel but I have no idea, I have tried to find a solution over online tutorials, but with no luck.

Is there a way to generate velocity inpus based on the position of each voxel? (because they are moving very fast)


About Xparticles Cache into Bgeo Nov. 5, 2017, 2:26 p.m.

Hi guys,

I have exported a xparticles simulation in Houdini as Bgeo

The info of the xparticles simulation has the 3 vectors of velocity but as soon as I convert the simulation into VDB from particles into fog I loose my velocity data.

I have try to find a solution with no luck. Any tips?