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vdb velocity trail

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Dear Houdini Artists


Coming from Softimage I quite immersed in to Houdini for a project about creating clouds.


So far I setup a POP simulation. Then I use the "vdb from particles" node to create fog vdb's and later pipe it trough cloud noise.


Now I am struggling with flickering when using velocity trail as particle footprint.

I also see the problem: The trail particles are following the rotation from the lead particle, thus resulting in a erratic behavior.


The thing is it would look awesome if I could get the velocity trails to work.


Am I missing something here?

Any hints?




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Thanks for pointing this out.


Is this possible with vdb?

If I create a vdb form ID attribute it is somehow not a level set grid...


Maybe better to use trail sop in the Particle sim directly?

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