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Maniphest T54734

Alembic Import does not respect remap relative
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Description

System Information
Windows 10 GTX 1080

Blender Version
Broken: 2.79 e5327af
Worked: (optional)

Short description of error
Save with remap relative paths option is not respected for Alembic imports. Images for example are automatically changed to relative paths with this option.
Exact steps for others to reproduce the error
Import an Alembic, save with remap relative option.

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Event Timeline

Vaughan Ling (heavypoly) created this task.Apr 20 2018, 5:49 AM
Vaughan Ling (heavypoly) renamed this task from Alembic Does not respect relative paths to Alembic Import does not respect remap relative.Apr 20 2018, 5:53 AM
Vaughan Ling (heavypoly) updated the task description. (Show Details)
Vaughan Ling (heavypoly) updated the task description. (Show Details)
Vaughan Ling (heavypoly) updated the task description. (Show Details)
Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 30.Apr 20 2018, 10:19 AM
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).

Cannot reproduce (unless I am misunderstanding something here).

You are talking about the paths in the Mesh Sequence Cache modifier and the Transform Cache constraint, right?

If I import an alembic these are set to absolute paths, if I then save the .blend [without saving before] with the Remap Relative option, these get relative paths as expected.
If I save the .blend in a different directory with the Remap Relative option, the paths get remapped as expected as well

Could you provide exact steps to reproduce the issue [uploading a .blend or .abc if neccessary]?
Also see the manual

Marking as incomplete for now...

Vaughan Ling (heavypoly) added a comment.Apr 20 2018, 7:10 PM

I found more detail on the problem:

Remap relative with alembics that were exported with Blender - Works
Remap relative with mesh cache exported from Maya - Works
Remap relative with transform cache (empty, no mesh data) exported from Maya - Doesn't work, and causes other previously working mesh caches to not remap relative

TWI_CLB_0015_locator_baked_head.abc7 KBDownload

remap test.blend1 MBDownload

Philipp Oeser (lichtwerk) added a comment.Apr 23 2018, 1:32 PM

Still cannot reproduce:

  • I open your .blend
  • I open my downloaded TWI_CLB_0015_locator_baked_head.abc in the Transform Cache Constraint [was set to C:/Users/kakapoopie/Dropbox (The Witness)/TWI/Crews/VaughanLing/CLB_0010/Alembic/TWI_CLB_0015_locator_baked_head.abc -- thats obviously not valid on my machine, it's now somthing like /Downloads/Blender Bugtracker/54734/TWI_CLB_0015_locator_baked_head.abc]
  • If I save the .blend in a different directory with the Remap Relative option, the path gets remapped as expected as well
  • If I import TWI_CLB_0015_locator_baked_head.abc into a new file and SaveAs, path gets relative as expected
Philipp Oeser (lichtwerk) added a comment.Jun 20 2018, 4:09 PM

@Vaughan Ling (heavypoly): could you confirm it is working as I described above?

Vaughan Ling (heavypoly) added a comment.EditedJun 20 2018, 7:21 PM

Found another detail to the problem. Remap relative works properly if I import an alembic. If I import 2 alembics, the 2nd imported does not remap relative, while the first imported does. (These alembics are coming from Maya)

Bastien Montagne (mont29) assigned this task to Sybren A. Stüvel (sybren).Jul 12 2018, 4:24 PM
Bastien Montagne (mont29) raised the priority of this task from 30 to Normal.
Bastien Montagne (mont29) added subscribers: Sybren A. Stüvel (sybren), Bastien Montagne (mont29).

@Sybren A. Stüvel (sybren), I’ll let you handle this, should be your playground :)

Sybren A. Stüvel (sybren) triaged this task as 30 priority.Aug 16 2019, 11:07 AM

I still can't reproduce this in Blender master (9dab57a9f829881dad1e659b53413ded15ec085e). Also with two different Alembic files imported as two different constraints on two different objects, it just works fine. The source of the Alembic file (whether it was written by Maya or Blender) really shouldn't matter in this.

@Vaughan Ling (heavypoly) please test with the latest daily build from https://builder.blender.org/download/ to see if this is still an issue. If it is, please provide us with the necessary files + steps to reproduce.

Philipp Oeser (lichtwerk) added a project: Alembic.Aug 16 2019, 11:11 AM
Sybren A. Stüvel (sybren) mentioned this in T69058: Alembic integration improvements.Aug 22 2019, 5:57 PM
Sybren A. Stüvel (sybren) added a parent task: T69058: Alembic integration improvements.Aug 22 2019, 6:03 PM
Sybren A. Stüvel (sybren) changed the task status from Unknown Status to Unknown Status.Aug 23 2019, 5:17 PM

Since last asking for information it has been 7 or more days, due to the policy of our bug tracker we will have to archive the report until the requested information is given.