Hey Team,

We are trying to use the instancing on the USD asset which has 3 variants on it. We are doing point instancing to scatter them in the scene.

The problem we are facing is when we use the assembly in the shots we are getting the crypto matte jumping between the shots in the identifier name layer.
Unfortunately, the material ID is jumping between the frames.

After checking it in the nuke, we found that in the matte list, we get <-3.43790561340e-13> kind of values.

We are also not able to see the attribute in the spreadsheet.

Please let me know, if anyone faced this kind of issue and if there is any possible solution available.


Softwares:
Houdini 19.
Renderman 24
Nuke 12

Thank you,
Amiy

Hello,

We are having the exact same issue.

We are making instances using duplicate node - make instanceable option.
Is this related to how cryptomatte is accessing the instanced primitives, maybe loosing parts of the prim paths or what could be the reason?
In Solaris the instanced prim names are definitely not changing between the frames.

The duplicate naming is generated using the default - '@srcname_@copy'


Rendering with Arnold by loading the saved usd into an arnold usd prim and rendering in Obj context.
I understand that I might be Arnold related but wanted to get some ideas if other render engines are having similar issues.
Using houdini 19.0.657 and 19.5.569.

Any help or ideas are much appreciated!

Many thanks,
Martin

same here,20.5 still has this bug.what a pity!

how to solve this?

I've run into this problem with a layout node in Houdini 20.0 and Arnold. I have not been able to figure this one out.

Daniel Eckstein
I've run into this problem with a layout node in Houdini 20.0 and Arnold. I have not been able to figure this one out.

still same in 20.5

still same in 21,it's a bug or limitation?

wanglifu
still same in 21,it's a bug or limitation?

If you're using Arnold, please discuss this with the HtoA team at Autodesk. If you're using Karma, please log a bug with us.

Thanks!