Strand groups lost when exporting a combined groom asset.

[MalikuMane]

• Addon: i.e Send to Unreal
• Steps to Reproduce the Problem: i.e. I clicked Pipeline > Export > Send to Unreal, In ABC export settings, set combine meshes to Groom for each Mesh. Then push assets.
• OS: Linux
• Addon Version: i.e. Send to Unreal 2.6.6
• Blender Version: i.e. Blender 4.2.12

When Grooms are exported combined, each strand in blender gets combined into a single strand group in Unreal. It should instead export each strand in blender to a separate strand group in unreal. This is what the GroomExporter plugin does.

[JoshQuake]

Thanks for the report! I will take a look as soon as possible.

[JoshQuake]

It's working as intended from what I can see. That option is to combine the grooms into a single groom asset.

[MalikuMane]

Look inside the groom asset at the strands tab, you should have 1 strand group for each curve exported from blender.

[JoshQuake]

oohh I see, sorry. I will look into it more tomorrow.

[JoshQuake]

Okay so so far what I'm finding is that Send2UE specifically uses Particle systems to export, and even converts curve objects into particle systems before export which will flatten into a single strand group. While GroomExporter specifically uses curve objects.

I'm curious why the decision was made to use particle systems. I will see if I can figure out why that decision was made and if I dont see any compelling reason to keep it this way I will probably work on converting the current functionality to use curve objects instead which allows for having strand groups.