gn hi

Thank you — this really helps!

Hi everyone,

I have a VDB volume A which is smaller than another VDB volume B.
I would like to expand the voxel range (bounding box) of volume A to match volume B — so that A’s grid covers the same space as B — but I want to keep the visual appearance (surface or fog shape) of A unchanged.

What would be the best approach or node setup to achieve this?

Thanks a lot for any advice!

thanks for your reading.

can I use Tetrahedral Constraints combo like this??


As the pic shows, I want to get more volume control when fiber contracting.
But when i use combo like this(in picture),i can never get the volume-control result.
why?
Are there any "rules" like :
tetrahedral fiber is not compatible with volume preservation?????

Also, when reading some old tutorials, someone will use "old combo"like
《tetrahedral fiber》+《tetrahedral volum》+《distance along edges》
why?Is that because of the upper rules?

And i tried the old combo with houdini 20.5,
But the result is so weird.

Really need your help, thank you!