AlembicProject
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Description

Alembic export & import support in Blender.

Join the discussion about Blender's Alembic support at T51195

More background information is collected on the wiki.

Recent Activity

Yesterday

Adam Juhasz (juhada) added a comment to T51195: Alembic targets for April 2017.

Ahaa! Wow that was a nice and clear explanation, thanks, I guess the conclusion is that maya 2014 has this oldschool alembic (HDF5) going on. No problem, cause I'll be leaving this workflow behind soon. Just would of loved to integrate blender into that pipeline and be more self reliant in shading/rendering. Thanks anyways.

Sat, Apr 22, 7:05 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) added a comment to T51195: Alembic targets for April 2017.

Hi Adam, thanks for joining the discussion and providing a test file. This file is written using the obsolete HDF5 format, which Blender doesn't support. You can convert it to the current Ogawa format using abcconvert (a tool included in Alembic).

Sat, Apr 22, 6:03 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) claimed T51292: Show notification when trying to load HDF5.
Sat, Apr 22, 6:02 PM · BF Blender, Alembic
Sybren A. Stüvel (sybren) moved T51262: Blender CRASH with alembic file from Waiting for feedback from OP to Backlog on the Alembic board.
Sat, Apr 22, 6:01 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) created T51292: Show notification when trying to load HDF5.
Sat, Apr 22, 6:01 PM · BF Blender, Alembic
Adam Juhasz (juhada) added a comment to T51195: Alembic targets for April 2017.

Hi All!

Sat, Apr 22, 3:55 PM · Alembic, BF Blender
Vuk Gardašević (lijenstina) added a project to T51284: Mesh not skinned: Alembic.
Sat, Apr 22, 3:35 AM · Alembic, BF Blender

Fri, Apr 21

LazyDodo (LazyDodo) added a comment to T51262: Blender CRASH with alembic file.

Then attach the crashing file to this ticket, otherwise we can't investigate the issue.

Fri, Apr 21, 10:42 PM · Alembic, BF Blender
Fran (foxist) added a comment to T51262: Blender CRASH with alembic file.

About the alembic file, precisely I was telling you before that I was sure that the file wasn't corrupted and I know this cause Maya imports the alembic file pefectly, so is not the alembic file. I just checked that to be secure that the file is not the problem.

Fri, Apr 21, 7:26 PM · Alembic, BF Blender
Aaron Carlisle (Blendify) added a project to T51280: Crash when removing cache modifier: BF Blender.
Fri, Apr 21, 6:16 PM · BF Blender, Alembic
Sergey Sharybin (sergey) changed the visibility for Alembic.
Fri, Apr 21, 4:44 PM
Sergey Sharybin (sergey) added a member for Alembic: Sergey Sharybin (sergey).
Fri, Apr 21, 4:44 PM
Sybren A. Stüvel (sybren) added a project to D2638: Alembic export: support simple child hairs (Fix T51144): Alembic.
Fri, Apr 21, 4:44 PM · Alembic
Dalai Felinto (dfelinto) closed T51261: New objects aren't selected as "Resolved" by committing rB19548040d91d: Fix T51261: New objects aren't selected.
Fri, Apr 21, 3:28 PM · Alembic, Restricted Project
Sybren A. Stüvel (sybren) reopened T51279: Add support for Alembic caches as "Open".

After talk with Andy, things are a bit more subtle than described...

Fri, Apr 21, 2:23 PM · Alembic, Blender Asset Manager
Sybren A. Stüvel (sybren) created T51280: Crash when removing cache modifier.
Fri, Apr 21, 12:42 PM · BF Blender, Alembic
Sybren A. Stüvel (sybren) closed T51279: Add support for Alembic caches as "Resolved".

Fixed in BAM rBAM8994385c634 (released as 1.1.5) and Blender Addons commit rBA08ee275f528f22a17c.
I'll kick the buildbot to create a new build for us to use in the studio.

Fri, Apr 21, 11:51 AM · Alembic, Blender Asset Manager
Sybren A. Stüvel (sybren) added a project to T51279: Add support for Alembic caches: Alembic.
Fri, Apr 21, 10:57 AM · Alembic, Blender Asset Manager
Sybren A. Stüvel (sybren) added a project to D2525: Alembic export & import improvements: Alembic.
Fri, Apr 21, 10:36 AM · Alembic
Sybren A. Stüvel (sybren) added a comment to T51262: Blender CRASH with alembic file.

Then attach the crashing file to this ticket, otherwise we can't investigate the issue.

Fri, Apr 21, 10:03 AM · Alembic, BF Blender

Thu, Apr 20

Fran (foxist) added a comment to T51262: Blender CRASH with alembic file.

Oh Im sorry, my fault... But yes, I used the last daily build before report this problem. Just now I have downloaded the daily build again and also I have exported another alembic file from the same Maya project and the problem still persisting in Blender. Maya imports the alembic without problem, so it isn't a corrupted file though...

Thu, Apr 20, 10:02 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) closed T50194: Alembic Import is really Flaky in 2.78a as "Resolved".

Well, that's easy then :-)

Thu, Apr 20, 9:38 PM · Alembic, BF Blender
LazyDodo (LazyDodo) added a comment to T50194: Alembic Import is really Flaky in 2.78a.

Given i wasn't able to repro with master in december, i'm pretty sure @Kévin Dietrich (kevindietrich) fixed this one before you took over.

Thu, Apr 20, 9:13 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) added a project to T51261: New objects aren't selected: Alembic.
Thu, Apr 20, 3:42 PM · Alembic, Restricted Project
Sybren A. Stüvel (sybren) moved T51144: Alembic export with multires and hair crash blender from Backlog to Waiting for review on the Alembic board.
Thu, Apr 20, 3:41 PM · Alembic, Import/Export, BF Blender
Sybren A. Stüvel (sybren) added a comment to T51144: Alembic export with multires and hair crash blender .

I've traced the problem to missing support for "Simple" child hairs (apparently only "interpolated" is supported at the moment). D2638 should fix this.

Thu, Apr 20, 3:41 PM · Alembic, Import/Export, BF Blender
Sybren A. Stüvel (sybren) moved T51262: Blender CRASH with alembic file from Backlog to Waiting for feedback from OP on the Alembic board.
Thu, Apr 20, 1:03 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) added a comment to T51262: Blender CRASH with alembic file.

The file works fine in current Master, please test with a daily build from builder.blender.org/download/

Thu, Apr 20, 1:03 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) added a comment to T51262: Blender CRASH with alembic file.

@Fran (foxist) at least give us the version of Blender you used to test. Those fields are there for a reason.

Thu, Apr 20, 1:02 PM · Alembic, BF Blender
Sergey Sharybin (sergey) assigned T51262: Blender CRASH with alembic file to Sybren A. Stüvel (sybren).

@Sybren A. Stüvel (sybren), mind having a look? Thanks!

Thu, Apr 20, 12:54 PM · Alembic, BF Blender
Fran (foxist) created T51262: Blender CRASH with alembic file.
Thu, Apr 20, 12:38 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) added a comment to T49447: Imported curves lag behind one frame..

This issue (lagging of imported curves) is a known problem, which is caused by limitations of the current modifier system in combination with Alembic. The modifiers are made to either construct a new object or deform an existing object. Since Alembic curves can change topology from one frame to another, the Mesh Cache modifier needs to do both (i.e. create a new object when the curve topology changes, and deform an existing object when it doesn't). To fix this properly, we'll have to modify the modifier system to allow both. I don't know if I can do this (or work around this issue another way) in time for 2.79; if not, we'll work it out in 2.8 (in which case there will be a different, more elegant approach to handling cached data).

Thu, Apr 20, 12:12 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) renamed T49447: Imported curves lag behind one frame. from "Release Candidate 2.78 Alembic Bug with Polylines or Nurbs Curves" to "Imported curves lag behind one frame.".
Thu, Apr 20, 12:05 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) moved T50194: Alembic Import is really Flaky in 2.78a from Backlog to Waiting for feedback from OP on the Alembic board.
Thu, Apr 20, 12:03 PM · Alembic, BF Blender

Wed, Apr 19

Alex (asuter) added a comment to T51195: Alembic targets for April 2017.

Thanks @Alex (asuter).

Interpolation of these animated values is up to the package.

How would a reader know whether those values should be interpolated at all, or just remain constant until the next value is keyed?

Wed, Apr 19, 8:40 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) added a comment to T51195: Alembic targets for April 2017.

Two more features just landed in Master:

Wed, Apr 19, 2:58 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) edited the description of T51195: Alembic targets for April 2017.
Wed, Apr 19, 11:04 AM · Alembic, BF Blender
Sybren A. Stüvel (sybren) added a comment to T51195: Alembic targets for April 2017.

Interpolation of these animated values is up to the package.

Wed, Apr 19, 10:37 AM · Alembic, BF Blender
Alex (asuter) added a comment to T51195: Alembic targets for April 2017.

Here's a simple Alembic cache with some static user properties, some animated one, and a user property on geometry. I made one of these for SideFX when they were upgrading their user property support and it proved useful. Let me know if you have any questions about it. In general, animated values are keyed on frames 1 and 10. Interpolation of these animated values if up to the package.

Wed, Apr 19, 1:06 AM · Alembic, BF Blender

Tue, Apr 18

Sybren A. Stüvel (sybren) edited the description of T51195: Alembic targets for April 2017.
Tue, Apr 18, 9:36 AM · Alembic, BF Blender

Fri, Apr 14

Sybren A. Stüvel (sybren) added a comment to T51195: Alembic targets for April 2017.

should we use the daily build or a specific branch ?

Fri, Apr 14, 12:51 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) edited the description of T51195: Alembic targets for April 2017.
Fri, Apr 14, 12:51 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) edited the description of T51195: Alembic targets for April 2017.
Fri, Apr 14, 12:50 PM · Alembic, BF Blender
Caetano (Caetano) added a comment to T51195: Alembic targets for April 2017.

should we use the daily build ?

Fri, Apr 14, 2:11 AM · Alembic, BF Blender

Thu, Apr 13

Rod Tebisx (rod.vfx.td) added a comment to T49234: Alembic Import issues.

For the case teste, the vertex number is constant, so is it possible to calculate proper motion blur.
Anyway, as an additional step, please check if possible to import "v" vector attribute on points (v is velocity vector attribute coming from Houdini alembic) and use as motion vector to make Cycles 2.5D motion blur.

Thu, Apr 13, 8:55 PM · Alembic, Cycles, Import/Export, BF Blender
Sybren A. Stüvel (sybren) added a comment to T50194: Alembic Import is really Flaky in 2.78a.

I've improved the importer quite a bit, maybe now is time to re-test using latest master?

Thu, Apr 13, 4:49 PM · Alembic, BF Blender
Sybren A. Stüvel (sybren) closed T50403: Alembic: locations issue as "Resolved".

Marking as resolved. Feel free to leave a comment when there are still issues (but please open up another ticket if it's a different issue).

Thu, Apr 13, 4:45 PM · Alembic, Import/Export, BF Blender
Sybren A. Stüvel (sybren) closed T50688: exporting instance groups to alembic results in empties with no geometry as "Resolved".

Fixed in ebb304511402

Thu, Apr 13, 4:42 PM · Alembic, BF Blender, Import/Export
Sybren A. Stüvel (sybren) added a project to D2609: Alembic: support instancing: Alembic.
Thu, Apr 13, 4:32 PM · Alembic
Sybren A. Stüvel (sybren) edited the description of T51195: Alembic targets for April 2017.
Thu, Apr 13, 4:02 PM · Alembic, BF Blender