[Sidefx-houdini-list] for each vdb question

Jordan Walsh jordan.h.walsh at gmail.com
Thu Sep 8 09:11:44 EDT 2016

You can simply use a vdbcombine node to flatten them all down to one grid.
Firs you drop a vdb node down as an empty grid, connect that to the first
input, then connect your 95 vdbs into the second input and check "Flatten
All B into A".
You need to setup the empty vdb with the correct name and voxel size first.


On 8 September 2016 at 13:42, Gerbrand Nel <g at cannonballbunny.com> wrote:

> Hey guys
> I'm making some clouds, and I need to render in maya.
> We use the redshift vdb loader to import the saved vdb files from houdini,
> into maya.
> No I got too clever for my own good using the for each loop sops.
> Instead of converting a collection of merged spheres to one vdb for all
> the clouds, I used connectivity to separate my clouds to pieces.
> I then run this through a "for each" to create a vdb volume for each cloud.
> I don’t know if this is faster than creating a huge vdb with lots of
> negative space, but it seems faster at least :)
> Now this is all very clever and shit, but now I'm stuck with 95 vdbs in my
> geometry.
> When I save this out to a vdb file, Maya only sees the 1st cloud.
> How would I merge all these grids into a single vdb grid, without doing it
> one by one?
> Thanks
> Gerbrand
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