question

Michael Heberlein avatar image
Michael Heberlein asked ·

HtoA archive export: "expand procedurals" and packed alembics

Hi,

we recently had this weird issue with packed alembics and I just managed to reproduce it with HtoA 3.1.0 in Houdini 16.5.536:

Exporting packed alembics to an .ass archive and enabling "expand procedurals" in the ROP leads to offset transforms when this archive is rendered. The bounding box it displays in Scene View is correct though and exporting the same archive without "expand procedurals" enabled works as expected as well.

The following image shows both archives rendered and while "07_procedural_packed" matches the original geometry's position, "08_procedural_expanded" is offset: https://drive.google.com/file/d/11RnO81DFYKJVjO5DU6j0sa3kCOrYHzEr

Here's a scene that reproduces the issue:
https://drive.google.com/drive/folders/1vg8VjNX_bSOVWjo1y5xqE682h-gmS6JJ
To make it work, just select `/out/09_render` and click "Render to Disk".

The cricital point is that both `/obj/01_box_transformed` and `/obj/03_import_transform_again/_01_box_transformed` are transformed and although rendering them as packed alembics works just fine, something must be missing or just handled differently at procedural expansion.

The only workaround I found for now was unpacking/converting the packed alembic right after `/obj/03_import_transform_again/READER/Alembic`.

Would be great if this can fixed!
Cheers

houdinihtoaalembic
10 |600 characters needed characters left characters exceeded

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

0 Answers

· Write an Answer

Write an Answer

Hint: Notify or tag a user in this post by typing @username.

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Welcome to the Arnold Answers community.

This is the place for Arnold renderer users everywhere to ask and answer rendering questions, and share knowledge about using Arnold, Arnold plugins, workflows and developing tools with Arnold.

If you are a new user to Arnold Answers, please first check out our FAQ and User Guide for more information.

When posting questions, please be sure to select the appropriate Space for your Arnold plugin and include the plugin version you are using.

Please include images, scene and log files whenever possible as this helps the community answer your questions.

Instructions for generating full verbosity log files are available for MtoA, MaxtoA, C4DtoA, HtoA, KtoA, and Kick.

If you are looking for Arnold Documentation and Support please visit the Arnold Support site.

To try Arnold please visit the Arnold Trial page.

Bottom No panel present for this section.