( Fixed ) [ HOU-2481 ] Point Reference wrong when using packed alembics - URGENT!

[david.anastacio]

Hi again,

Point reference renders incorrectly when using packed alembic files. Can we get a fix for this as soon as possible please. And we need this other one fixed too, or we won't be able to use the update: https://forums.chaosgroup.com/forum/...-working-again

In this example I used one of the test geometries, slapped a rest attribute to it and "deformed" the mesh using a simple transform.

Using a live geo, point reference renders correctly:


Baking the same mesh with the animation to an alembic file and reading it back in, the point ref renders incorrectly and is an exact match to the point world position:


And then unpacking that same alembic file makes the point ref render correctly again:


And here's a comparison between the two:


All this renders use the "Reference Mesh" options set to "Rest Attributes":


Tested in:
V-Ray for Houdini number:9708 hash:60603f4 from 25 Nov 2020 05:01 (build number:970
V-Ray Core 4.30.03 [262ab902] from 24 Nov 2020

and:
V-Ray for Houdini number:12356 hash:9ce98d4 from 09 Mar 2021 05:07 (build number:12356)
V-Ray Core 4.30.03 [14fe1e94] from 12 Feb 2021

Best,
David.

[chakarov]

This one is fixed in latest nightly builds.

[david.anastacio]

Thanks chakarov , really appreciated.

[david.anastacio]

Hi again chakarov, unfortunately there is still an issue with the reference point position if the objects have displacement, I e-mailed a more detailed explanation do Andrei.

Best,
David.