T78459 : glTF Exporter won't properly export linked collections if 'Selected objects' option is toggled

[globglob3D]

Describe the bug
glTF Exporter won't properly export linked collections if 'Selected objects' option is toggled and those collections are selected. This use to work as intended before 2.83. The .glb do get exported but the objects in linked collections are not in the file.

To Reproduce
Steps to reproduce the behavior:
Create a .blend with any object under a collection and save.
Create new blend, link the previous collection, try to export it with 'Selected objects' option toggled. "
Test the .glb in a viewer like this one https://gltf-viewer.donmccurdy.com/
(Note that I've only tested for .glb, this might still work for .gltf)

Expected behavior
The objects under a linked Collection should be exported like any other object.

Version

• OS: Windows 10
• Blender Version: 2.83.1 and daily build 2.90

[globglob3D]

One workaround if you have objects in your scene that you doesn't want exported is simply to put them in a disabled collection before the export.

EDIT: Actually if you have linked collection objects in other inactive collections they sometimes get exported too. Which means that currently the most reliable workaround is to copy the objects you want to export (use the Copy Attribute addon), create a new .blend file, and paste them here for export.

[zauberparacelsus]

Are Linked Collections the same as Collection Instances? (IE: where you hit Shift-A and select something from the Collection Instance submenu)

I'm asking because I'm encountering an issue with those not being exported as well, except they don't get picked up regardless of what Selected Objects is set to.

EDIT: This is in 2.90, btw

[LorenzWieseke]

Having the same Issue, linked collections don't get exported, no matter if "selected objects" option is checked or not.

[KannebTo]

I found another workaround:

• right click on linked collection > ID Data > Add Library Override Hierarchy
• delete the linked collection and keep the override

Now everything seems to work as expected with or without Selected Objects option.

[emrum]

this is still an issue .

maybe this below is related -

https://blender.stackexchange.com/questions/168140/batch-exporting-scene-collections-or-selected-objects-using-gltf-blender-io

[julienduroure]

Hello,
Proper collection ans instance management need a big refactoring that is currently in progress in #1378

[julienduroure]

I confirm that it will be solved by #1378 #1472 #1494

[julienduroure]

Fixed by 69746b2