# \#rendering **URL:** https://forum.aousd.org/tag/rendering/3.md [Latest](https://forum.aousd.org/latest.md) · [Categories](https://forum.aousd.org/categories.md) · [Tags](https://forum.aousd.org/tags.md) --- ## [Export Hair Guides to DCCs](https://forum.aousd.org/t/export-hair-guides-to-dccs/3050)
**Author:** [@madoodia](https://forum.aousd.org/u/madoodia)\ **Replies:** 0\ **Last updated:** [September 23, 2026, 6:35pm UTC](https://forum.aousd.org/t/export-hair-guides-to-dccs/3050 "2026-09-23T18:35:26Z")
Hello all I hope everything goes well I like to share my current under development standalone Grooming Software, and latest update that is exporting USDA file from it and open in other DCCs like usdView, maya, houdini … --- ## [Introducing Roji: An End-to-End OpenUSD Workflow for Scene Assembly, Look Development, Lighting and Rendering](https://forum.aousd.org/t/introducing-roji-an-end-to-end-openusd-workflow-for-scene-assembly-look-development-lighting-and-rendering/3028)
**Author:** [@RABIA](https://forum.aousd.org/u/RABIA)\ **Replies:** 0\ **Last updated:** [August 27, 2026, 4:16pm UTC](https://forum.aousd.org/t/introducing-roji-an-end-to-end-openusd-workflow-for-scene-assembly-look-development-lighting-and-rendering/3028 "2026-08-27T16:16:06Z")
Hi everyone, I’m Rabia Rahou, founder of Roji Research, I’m developing Roji, an end-to-end OpenUSD environment that brings scene assembly, look development, lighting, interactive review and rendering into one connected… --- ## [Shutter interval requirement: must include 0.0?](https://forum.aousd.org/t/shutter-interval-requirement-must-include-0-0/2907)
**Author:** [@danlea\_foundry](https://forum.aousd.org/u/danlea_foundry)\ **Replies:** 1\ **Last updated:** [April 24, 2026, 2:20pm UTC](https://forum.aousd.org/t/shutter-interval-requirement-must-include-0-0/2907 "2026-04-24T14:20:16Z")
Is there a hard requirement that \[frame-relative\] shutter intervals must include 0.0, and if so, where might this be stipulated? I don’t see it stated explicitly anywhere in OpenUSD. I expect that it may be an industry s… --- ## [BowerBot: AI agent that assembles production-correct OpenUSD scenes from plain English](https://forum.aousd.org/t/bowerbot-ai-agent-that-assembles-production-correct-openusd-scenes-from-plain-english/2905)
**Author:** [@ArturoRangel](https://forum.aousd.org/u/ArturoRangel)\ **Replies:** 0\ **Last updated:** [April 17, 2026, 2:05am UTC](https://forum.aousd.org/t/bowerbot-ai-agent-that-assembles-production-correct-openusd-scenes-from-plain-english/2905 "2026-04-17T02:05:24Z")
Built an open-source AI agent that takes a plain English scene description and outputs a production-correct OpenUSD scene hierarchy, materials, lighting, validation. Opens in any USD-compatible DCC without conversion… --- ## [How to use the Hydra 2.0 API to parse geomSubset types](https://forum.aousd.org/t/how-to-use-the-hydra-2-0-api-to-parse-geomsubset-types/2870)
**Author:** [@zitai](https://forum.aousd.org/u/zitai)\ **Replies:** 0\ **Last updated:** [March 3, 2026, 2:13am UTC](https://forum.aousd.org/t/how-to-use-the-hydra-2-0-api-to-parse-geomsubset-types/2870 "2026-03-03T02:13:54Z")
At present, I am using the Hydra 1.0 API for parsing .usd files. Recently, I learned that upgrading to Hydra 2.0 API has brought many powerful features (thank you to all developers for your contributions). I want to migr… --- ## [Usdskel causes polygons to render faceted - without normals](https://forum.aousd.org/t/usdskel-causes-polygons-to-render-faceted-without-normals/1971)
**Author:** [@TimRileyDNEG](https://forum.aousd.org/u/TimRileyDNEG)\ **Replies:** 11\ **Last updated:** [December 8, 2025, 11:45pm UTC](https://forum.aousd.org/t/usdskel-causes-polygons-to-render-faceted-without-normals/1971 "2025-12-08T23:45:23Z")
We’re experiencing an issue in rendering Crowds with usdskel, whereby all the geometry that is saved as polygons is dropping the normals information at rendertime - and appearing as faceted. We lose the nice smooth norma… --- ## [Rendering Selection Outline in Hydra w/ Storm?](https://forum.aousd.org/t/rendering-selection-outline-in-hydra-w-storm/2772)
**Author:** [@joao\_dgg](https://forum.aousd.org/u/joao_dgg)\ **Replies:** 3\ **Last updated:** [November 24, 2025, 7:57am UTC](https://forum.aousd.org/t/rendering-selection-outline-in-hydra-w-storm/2772 "2025-11-24T07:57:23Z")
Are we able to render selection outlines with Hydra and, specifically, Storm? From the HdTaskController API, it seems like that should be possible with SetSelectionEnableOutline, but no matter what I do I can only see t… --- ## [Distributed USD](https://forum.aousd.org/t/distributed-usd/2757)
**Author:** [@renderdude](https://forum.aousd.org/u/renderdude)\ **Replies:** 6\ **Last updated:** [November 12, 2025, 11:30am UTC](https://forum.aousd.org/t/distributed-usd/2757 "2025-11-12T11:30:29Z")
We generate our USD files through Houdini/ANARI/… on our desktop systems, and I want to distribute the generated USD to our large HPC clusters for rendering. We can’t install a third-party queuing system as we already ha… --- ## [Primvars and Relationships](https://forum.aousd.org/t/primvars-and-relationships/2753)
**Author:** [@dietchmatch](https://forum.aousd.org/u/dietchmatch)\ **Replies:** 5\ **Last updated:** [October 29, 2025, 4:51am UTC](https://forum.aousd.org/t/primvars-and-relationships/2753 "2025-10-29T04:51:32Z")
Hi! I have a Renderman shader on which i’m reading a mesh int primvar ( using PxrPrimvar ) to switch between different textures. This works nicely, but if i create a Relationship on my mesh instead of creating a primva… --- ## [NURBS and trimming curves](https://forum.aousd.org/t/nurbs-and-trimming-curves/2750)
**Author:** [@nyue](https://forum.aousd.org/u/nyue)\ **Replies:** 1\ **Last updated:** [October 27, 2025, 10:58pm UTC](https://forum.aousd.org/t/nurbs-and-trimming-curves/2750 "2025-10-27T22:58:50Z")
I am looking for simple USD ascii example of NURBS mesh with multiple and nested trim curve. I am hoping to learn what constitute a valid scene that renders correctly e.g. in usdview with a render delegate that supports… --- ## [Usdz file is failed loading in iPhone AR viewer](https://forum.aousd.org/t/usdz-file-is-failed-loading-in-iphone-ar-viewer/2724)
**Author:** [@justinwang](https://forum.aousd.org/u/justinwang)\ **Replies:** 7\ **Last updated:** [October 15, 2025, 7:46pm UTC](https://forum.aousd.org/t/usdz-file-is-failed-loading-in-iphone-ar-viewer/2724 "2025-10-15T19:46:21Z")
Hi experts, I am opening the attached usdz file by iPhone AR viewer in iOS version 18 - 26. But the usdz file is failed loading in iPhone AR viewer. Do you know what causes it? Thanks a lot! CR65\_Elegance\_Updatedq.usdz … --- ## [UsdShade: connect to inputs of consuming material](https://forum.aousd.org/t/usdshade-connect-to-inputs-of-consuming-material/2735)
**Author:** [@herbst](https://forum.aousd.org/u/herbst)\ **Replies:** 1\ **Last updated:** [October 15, 2025, 6:41pm UTC](https://forum.aousd.org/t/usdshade-connect-to-inputs-of-consuming-material/2735 "2025-10-15T18:41:48Z")
I’m trying to understand how I can reuse NodeGraphs while still being able to pass material properties down to them from multiple materials that may use the same NodeGraph. This is my attempt at finding an alternative t… --- ## [How to readback AOVs from glslfx shader?](https://forum.aousd.org/t/how-to-readback-aovs-from-glslfx-shader/2653)
**Author:** [@Grimmigbeisser](https://forum.aousd.org/u/Grimmigbeisser)\ **Replies:** 3\ **Last updated:** [October 1, 2025, 10:53am UTC](https://forum.aousd.org/t/how-to-readback-aovs-from-glslfx-shader/2653 "2025-10-01T10:53:57Z")
Hi, i am working on a custom outline glslfx shader for hdstorm. My idea was to use the primid and instanceid AOVs for edge detection. I wrote a custom HdxTask, which uses an HdSt\_ImageShaderRenderPass. To supply the AOV… --- ## [Support different material binding purposes based on current active display purposes](https://forum.aousd.org/t/support-different-material-binding-purposes-based-on-current-active-display-purposes/2633)
**Author:** [@Mithridates](https://forum.aousd.org/u/Mithridates)\ **Replies:** 0\ **Last updated:** [August 5, 2025, 2:07pm UTC](https://forum.aousd.org/t/support-different-material-binding-purposes-based-on-current-active-display-purposes/2633 "2025-08-05T14:07:13Z")
Problem Description In the current OpenUSD implementation, a render delegate specifies its supported material via the GetMaterialBindingPurpose() function, which means only materials with a matching purpose are instantia… --- ## [When using CameraUtilFraming API, what is the expected data outside the dataWindow?](https://forum.aousd.org/t/when-using-camerautilframing-api-what-is-the-expected-data-outside-the-datawindow/2592)
**Author:** [@debloip-adsk](https://forum.aousd.org/u/debloip-adsk)\ **Replies:** 0\ **Last updated:** [July 17, 2025, 7:04pm UTC](https://forum.aousd.org/t/when-using-camerautilframing-api-what-is-the-expected-data-outside-the-datawindow/2592 "2025-07-17T19:04:04Z")
Hello, We are trying to use the CameraUtilFraming to do crop region rendering (so having a certain portion of the viewport rendered with one renderer, with the rest rendered by another). For this we are currently experi… --- ## [HdPrman for Maya](https://forum.aousd.org/t/hdprman-for-maya/2549)
**Author:** [@thornydre](https://forum.aousd.org/u/thornydre)\ **Replies:** 4\ **Last updated:** [July 1, 2025, 12:41pm UTC](https://forum.aousd.org/t/hdprman-for-maya/2549 "2025-07-01T12:41:26Z")
Hello, We are just starting to implement USD into our pipeline, and doing some early testing. We are using Renderman, we managed to have HdPrman running in Maya viewport, but opening a USD file with a PxrSurface materia… --- ## [HdMeshUtil::ComputeTriangleIndices and the UsdGeomSubset indices attribute](https://forum.aousd.org/t/hdmeshutil-computetriangleindices-and-the-usdgeomsubset-indices-attribute/2504)
**Author:** [@omnnai](https://forum.aousd.org/u/omnnai)\ **Replies:** 0\ **Last updated:** [June 6, 2025, 4:30am UTC](https://forum.aousd.org/t/hdmeshutil-computetriangleindices-and-the-usdgeomsubset-indices-attribute/2504 "2025-06-06T04:30:19Z")
I am using Hydra for a typical rasterizer with a Vulkan backend. I rely on the HdMeshUtil::ComputeTriangleIndices to produce a single index buffer that can be used for reading from various vertex streams. Some meshes s… --- ## [Opening a USD stage and rendering in a separate thread](https://forum.aousd.org/t/opening-a-usd-stage-and-rendering-in-a-separate-thread/2456)
**Author:** [@mmarkd8](https://forum.aousd.org/u/mmarkd8)\ **Replies:** 1\ **Last updated:** [May 17, 2025, 5:32am UTC](https://forum.aousd.org/t/opening-a-usd-stage-and-rendering-in-a-separate-thread/2456 "2025-05-17T05:32:06Z")
I have a C++ physical simulation app which opens the USD stage to read physics from it and start the simulation. Now I’d like a simple debug visualization but I’m really concerned that this might impact my simulation req… --- ## [How do I get CMake to generate the Xcode file described in this tutorial?](https://forum.aousd.org/t/how-do-i-get-cmake-to-generate-the-xcode-file-described-in-this-tutorial/2421)
**Author:** [@dub1988](https://forum.aousd.org/u/dub1988)\ **Replies:** 0\ **Last updated:** [May 1, 2025, 11:38pm UTC](https://forum.aousd.org/t/how-do-i-get-cmake-to-generate-the-xcode-file-described-in-this-tutorial/2421 "2025-05-01T23:38:53Z")
In the Creating A 3D Application With Hydra Rendering tutorial on the Apple Developer website, on the last step where I execute this command: cmake -S ~/Users/macuser/CreatingA3DApplicationWithHydraRendering/ -B ~/Users/… --- ## [Dome light on windows and macOS](https://forum.aousd.org/t/dome-light-on-windows-and-macos/1895)
**Author:** [@hateom](https://forum.aousd.org/u/hateom)\ **Replies:** 18\ **Last updated:** [April 22, 2025, 10:04am UTC](https://forum.aousd.org/t/dome-light-on-windows-and-macos/1895 "2025-04-22T10:04:42Z")
When I add Dome Light from the code, on windows build I see no difference. On macOS build I suddenly see a dome spherical background (see below). Is there a difference between windows and macOS in this area? Or am I miss… --- ## [Lighting and usdview, usdrecord discrepancies](https://forum.aousd.org/t/lighting-and-usdview-usdrecord-discrepancies/2376)
**Author:** [@Arun](https://forum.aousd.org/u/Arun)\ **Replies:** 1\ **Last updated:** [April 15, 2025, 4:40pm UTC](https://forum.aousd.org/t/lighting-and-usdview-usdrecord-discrepancies/2376 "2025-04-15T16:40:13Z")
I have a scene with a RectLight and three SphereLights. I tweaked the lights so that it looks good in usdview. Now I observe the following: If I switch to a camera defined in the scene (say “OverheadCam”), the scene l… --- ## [Using MaterialOverride Schema](https://forum.aousd.org/t/using-materialoverride-schema/2269)
**Author:** [@Nicola](https://forum.aousd.org/u/Nicola)\ **Replies:** 7\ **Last updated:** [February 27, 2025, 11:34am UTC](https://forum.aousd.org/t/using-materialoverride-schema/2269 "2025-02-27T11:34:16Z")
I’m experimenting the Hydra 2.0 and I’m trying to understand how I can use the MaterialOverride schema to apply tweaks to the material parameters using a UI. What is the correct way to specify material overrides in a usd… --- ## [Bare minimum UsdImagingGLEngine Code](https://forum.aousd.org/t/bare-minimum-usdimagingglengine-code/2260)
**Author:** [@MrMichael](https://forum.aousd.org/u/MrMichael)\ **Replies:** 3\ **Last updated:** [February 25, 2025, 2:24am UTC](https://forum.aousd.org/t/bare-minimum-usdimagingglengine-code/2260 "2025-02-25T02:24:01Z")
Hello! I’m working on a hobby project and I was wondering if anyone has the bare minimum pxr::UsdImagingGLEngine that I could learn and understand! I tried following the stageView.py but I seem to be stuck with the same… --- ## [Standardization of Visibility Types in USD](https://forum.aousd.org/t/standardization-of-visibility-types-in-usd/2211)
**Author:** [@viktor-hallen](https://forum.aousd.org/u/viktor-hallen)\ **Replies:** 2\ **Last updated:** [February 12, 2025, 2:02am UTC](https://forum.aousd.org/t/standardization-of-visibility-types-in-usd/2211 "2025-02-12T02:02:33Z")
Hi everyone, What are USD’s thoughts on handling different visibility types, like primary visibility (aka render visibility) and similar attributes? Right now, each render delegate (RenderMan, V-Ray, Arnold, etc.) has … --- ## [Getting statistics out of hdPrman](https://forum.aousd.org/t/getting-statistics-out-of-hdprman/2080)
**Author:** [@alasdairhitchen](https://forum.aousd.org/u/alasdairhitchen)\ **Replies:** 1\ **Last updated:** [February 6, 2025, 5:59pm UTC](https://forum.aousd.org/t/getting-statistics-out-of-hdprman/2080 "2025-02-06T17:59:09Z")
Hi everyone, Has anyone managed to get rendering statistics out of hdPrman? I have found the HdRenderDelegate::GetRenderStats virtual method but this doesn’t seem to be implemented for the render delegate, looking at th… --- ## [Removing UsdRenderPass denoise:enable attribute](https://forum.aousd.org/t/removing-usdrenderpass-denoise-enable-attribute/2212)
**Author:** [@blevin](https://forum.aousd.org/u/blevin)\ **Replies:** 0\ **Last updated:** [February 6, 2025, 4:51pm UTC](https://forum.aousd.org/t/removing-usdrenderpass-denoise-enable-attribute/2212 "2025-02-06T16:51:30Z")
We wanted to give an early heads-up that we’d like to remove the “denoise:enable” attribute of UsdRenderPass. This attribute was added during original exploration of UsdRender denoising back in 2022. Subsequently, our … --- ## [Pi Prototype Propagating Scene Index removes types from Hydra prototype prims?](https://forum.aousd.org/t/pi-prototype-propagating-scene-index-removes-types-from-hydra-prototype-prims/2199)
**Author:** [@ppt-adsk](https://forum.aousd.org/u/ppt-adsk)\ **Replies:** 1\ **Last updated:** [February 3, 2025, 9:30pm UTC](https://forum.aousd.org/t/pi-prototype-propagating-scene-index-removes-types-from-hydra-prototype-prims/2199 "2025-02-03T21:30:45Z")
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… --- ## [How to transition from UsdImagingGLEngine to Metal on macOS?](https://forum.aousd.org/t/how-to-transition-from-usdimagingglengine-to-metal-on-macos/1698)
**Author:** [@hateom](https://forum.aousd.org/u/hateom)\ **Replies:** 18\ **Last updated:** [January 30, 2025, 2:10am UTC](https://forum.aousd.org/t/how-to-transition-from-usdimagingglengine-to-metal-on-macos/1698 "2025-01-30T02:10:14Z")
Hello, I have been using UsdImagingGLEngine for a simple renderer in my c++ application and now I need to port it to macOS/Metal. Where can I find simple example that renders a simple USD scene using Metal? I have been… --- ## [Can't find a stable USD + OSL \> Renderman/hdPrman pipeline](https://forum.aousd.org/t/cant-find-a-stable-usd-osl-renderman-hdprman-pipeline/2032)
**Author:** [@rafapp](https://forum.aousd.org/u/rafapp)\ **Replies:** 1\ **Last updated:** [November 26, 2024, 8:39pm UTC](https://forum.aousd.org/t/cant-find-a-stable-usd-osl-renderman-hdprman-pipeline/2032 "2024-11-26T20:39:09Z")
I’ve been tinkering the past few months trying to get a pipeline as follows: USD Python API to generate a .usd scene (which has .obj meshes, OSL shaders, a camera and lights) \> scene.usd \> usdview \> rendering with hdprm… --- ## [Hydra Invalidation when updating Materials and Point Instancers](https://forum.aousd.org/t/hydra-invalidation-when-updating-materials-and-point-instancers/1930)
**Author:** [@dhruvgovil](https://forum.aousd.org/u/dhruvgovil)\ **Replies:** 1\ **Last updated:** [November 7, 2024, 6:57pm UTC](https://forum.aousd.org/t/hydra-invalidation-when-updating-materials-and-point-instancers/1930 "2024-11-07T18:57:46Z")
Hey Hydra Experts, We’re seeing Hydra being quite aggressive with the scene invalidation both with and without USDIMAGINGGL\_ENGINE\_ENABLE\_SCENE\_INDEX. We’re seeing the following two issues with USD 24.3/24.5 When we … [Next page](https://forum.aousd.org/tag/rendering/3.md?match_all_tags=true&page=1&tags%5B%5D=rendering)