[PHI-5938] Resampling Vel fields, not working.

[hsz]

Resampling velocity fields aren't working in Vray 4 and 5 to recreate just take any VDB, and resample vel fields to be 1/2 the res of the density field. This means I have to store the full-res fields for vel, and that alone takes up 40-50% of the total VDB cache on disk. Super annoying from a storage and IO point of view.
Can this be fixed? thanks

This works fine in Mantra, 3DL, and Arnold by the way.

[Gosho.Genchev]

Hey hsz ,

indeed that is the case - the volume grid shader expects all fields to have the same voxel size. This RFE is already logged in our tracker - the developers are currently working on absorption and anisotropic scattering so once that is out of the way, I hope we'll be able to focus on improvements such as the one you've requested.

I'll keep you posted.

Best regards!

[Dubbie99]

the developers are currently working on absorption and anisotropic scattering

Well this is music to my ears!

[glacierise]

+1 for this, half res velocities really help

[hsz]

Checking on this, since it has been quite a while. Any updates on this? Thanks!

[Gosho.Genchev]

Hey hsz ,

The development team recently implemented support for sampling a single vector field for e.g. velocity or smoke color. Support for downsampled fields is also on the roadmap for future updates yet I can't claim with certainty when it will be ready. We will be sure to inform you once that makes it into V-Ray for Houdini.

Best regards!