Send to Unreal - Option to Automatically join mesh hierarchy

[rocifier]

All mesh objects are exported to unreal independently regardless of their parent/child relationship. Ideally if objects are parented to a mesh inside the Mesh collection, then only the parent would be exported and the children would be nested under the parent mesh (I believe FBX supports parent/child meshes).

Current behaviour:

Desired behaviour (single static mesh):

[james-baber]

@rocifier I have had a few other people mention this. I think we could add this as an option. 'Join Mesh Hierarchy ' that could be turned on under the 'Export' panel

[rocifier]

I think there are a few scenarios people will be interested in:

1. The above case, where they just want a single static mesh
2. Preserving the parent/child relationship via SceneComponent hierarchy. Currently File -> Import into Level (in Unreal) handles this.
3. Ignoring the hierarchy and having every mesh exported separately

[TylerMcGinn]

This can be done by a regular export .fbx when using export option "Selected Objects" and when importing with the unreal import dialog setting "Combine meshes" enabled.

[james-baber]

This has been added. You can try it out in the latest release.
https://github.com/EpicGames/BlenderTools/releases/tag/20201218214910