[Sidefx-houdini-list] for each vdb question

Gerbrand Nel g at cannonballbunny.com
Thu Sep 8 10:57:16 EDT 2016


I think I got it working, but the resolution seems to go down when i do it.
Is this normal?
G
On 08/09/2016 15:21, Gerbrand Nel wrote:
> thanks Jordan!
> I'm not sure how to name the empty vdb though.
> I did do a channel reference for the voxel size, but I'm not sure if 
> it works untill i get the name right
> G
> On 08/09/2016 15:11, Jordan Walsh wrote:
>> 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.
>>
>> Jordan
>>
>> 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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