Hi all,

I'm trying to do some volumetric renders, but i'm not able to transfer the point attributes to an volume.

I have a metaball copied with particles, and converting that into a isosurface. And mixing it with a volume mix.
Thats is deleting my point attributes (POP).

any guess?

thanks!

This would be a good thing to get overall, yes. Volume support in AttribTransfer and Magnet, and for the IsoOffset SOP to be able to also fill Fog Volumes from Metaballs with point attributes, etc.

And another plug for the Gas Particle To Field DOP functionality in SOPs.

No quick workarounds come to mind, I'm afraid

f*ck i thought there was something )

Anyway, i'm doing that rendering metaballs as volumes, but the quality is not as good. Even tweaking the hidden attribute “volume step” in the object/sampling tab.

But i'm not able to mix the volume and override the shader attributes S

Yep, In the attribTransfer options there are “detail”,“point”,“primitive”,“vertices”

Seems to make sense add a “volume” there.

maybe for the next release SESI? (i don't mean H10) )

Would doing it this way help? Look in sphereobject1, I've used the same reference sphere that builds the volume, and transfered the point colours to the volume.

Unfortunately this doesn't vary across the volume - its a point attribute on the single point which is the origin of the Volume.

I tried to copy metaballs to every point and then use 3 IsoOffset SOPs (one for R, G and B) but I found that the IsoOffset, when populating Fog Volumes from Metaballs, cannot add metaballs at a lower density nor does it have any local variables (like a $PT, $CR, etc) to enable some tricksy-ness like this. (SESI, can we RFE both of those too?)

Of course it does, I forgot to put the Scatter sop ahead of the colour sop ops:
But that doesn't help either since it just adds the colours together into a single colour across the volumn.

If you're willing to just take the colour from the nearest neighbour, then one can use the nearpoint() expression using $X,$Y,$Z in a VolumeMix.