Import USD - Organization

   206   2   0
User Avatar
Member
21 posts
Joined: Dec. 2015
Offline
Hey guys,

First of all, I just started learning Karma so I might not be expressing myself in the best way possible since I'm not really sure what's going on here

Right now Im having an issue importing a USD file using the Reference node.
It kinda works, but it's messy, so I assume there might be a way to tight things up

Here's what's happening:
Im importing a USD (exported from Blender) that have all features from a scene.
So it have an Environment Mesh with materials, an env_light and a camera

On my Scene Graph everything looks organized enough.

Now I need to use the lightlinker to make the env_light ignore the environment mesh, but as soon as I add the node I can see it has 2 scene roots in there.

Why? Why do I have 2 scene roots in there?

The scene is not working properly so I figured out this might be a good start on understanding how to make everything work on the most optmized way possible

You can download the hip with the the asset here [www.dropbox.com] if you wanna have a look at it

Thanks!
Edited by VFX_Skull - Jan. 14, 2026 15:23:46

Attachments:
scr.png (3.4 MB)

User Avatar
Member
286 posts
Joined: Jan. 2015
Offline
What version of Houdini are you using?

I think this was a bug mentioned somewhere on the forum earlier. I can't find the post now tough :/

Anyways it works as expected with the Houdini 21.0.512.

Edit:

I tried 21.0.559 also. It has the same issue as you mentioned.


Daily build 21.0.595 it's fixed.
Edited by Heileif - Jan. 14, 2026 22:09:59
User Avatar
Member
21 posts
Joined: Dec. 2015
Offline
Hey Heileif,Im on 21.0.559
Ok, great! Thank you
  • Quick Links