Oliver Speiser

O_Speiser

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VFX Artist
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Germany
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Volume Rasterize is scale dependend?? Nov. 18, 2022, 4:42 a.m.

They have different dimensions. The one is bigger and the other one is a little pice cut out of it.
I have gathered that size doesn't matter, as when resized the displayed resolution does not change.
The deciding factor seems to be the total resolution or number of voxels. The more voxels I've got, the more blurred details look in the viewport.
I played around with the values for 3d textures but they didnt change anything.
I guess it's not a big deal in general but a little unfortunate in this particular setup.

Volume Rasterize is scale dependend?? Nov. 17, 2022, 11:56 a.m.

Okay, further testing has been done.
Actually, only the viewport looks different (even after the pyro solver) but when rendered, they look the same. So the data is indeed the same. That kinda answers all former questions I guess...

But now my (hopyfully)final question for today:

Can I tell the houdini viewport to render both volumes more similar to each other?

Volume Rasterize is scale dependend?? Nov. 17, 2022, 11:18 a.m.

Too make my question more clear, I prepared and example file and attached it.

There's a volume rasterized out of a long line of noisy particles and then a volume created just out of the center piece.
As a volume in viewport they look different. But as seen throgh a volumeslice they look the same. Why is this so?

Again, thanks a lot.
Oliver