# Pi Prototype Propagating Scene Index removes types from Hydra prototype prims?

**URL:** <https://forum.aousd.org/t/pi-prototype-propagating-scene-index-removes-types-from-hydra-prototype-prims/2199>\
**Category:** Hydra\
**Tags:** rendering\
**Created:** [February 3, 2025, 7:55pm UTC](https://forum.aousd.org/t/pi-prototype-propagating-scene-index-removes-types-from-hydra-prototype-prims/2199 "2025-02-03T19:55:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ppt-adsk](https://avatars.discourse-cdn.com/v4/letter/p/f4b2a3/32.png) [@ppt-adsk](https://forum.aousd.org/u/ppt-adsk)\
**Post date:** [February 3, 2025, 7:55pm UTC](https://forum.aousd.org/t/pi-prototype-propagating-scene-index-removes-types-from-hydra-prototype-prims/2199/1 "2025-02-03T19:55:43Z")

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Hello, as per the title the PiPrototypePropagatingSceneIndex seems to remove the prim type for at least mesh and geomSubset prims, for prototypes under a point instancer. This can be observed with usdview in scene index mode using the attached scene, e.g. see prims under /rubikCubes/instancer/prototypes/geom/geo/proxy. Is there any reason for this? We are having to work around this in our own code. We are using OpenUSD 24.11, with Hydra 2.0. Thanks for any help.

[rubiksCube\_scatter.zip](https://forum.aousd.org/uploads/short-url/mJmclRyg4x06ZN5qLwJ9nOumIrv.zip) (103.6 KB)

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**Author:** ![robp\_sidefx](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.aousd.org/robp_sidefx/32/327_2.png) [@robp\_sidefx](https://forum.aousd.org/u/robp_sidefx)\
**Post date:** [February 3, 2025, 9:30pm UTC](https://forum.aousd.org/t/pi-prototype-propagating-scene-index-removes-types-from-hydra-prototype-prims/2199/2 "2025-02-03T21:30:45Z")

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This is related: [Materials under an instancer's Prototypes are dropped in the Scene Index pipeline · Issue #3483 · PixarAnimationStudios/OpenUSD · GitHub](https://github.com/PixarAnimationStudios/OpenUSD/issues/3483)