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Changelog

[Unreleased]

Build

  • usd#1480 - Allow to specify a testsuite output folder
  • usd#1463 - Fix Windows builds with CMake
  • usd#1471 - Support relative paths for Arnold and USD Sdk
  • usd#1466 - Allow to run the testsuite without any build of the procedural

Bugfixes

  • usd#1485 - MaterialX shader nodes should have "auto" colorspace by default
  • usd#1459 - Support Shaders with multiple outputs
  • usd#1359 - Refresh the arnold instancer when the prototype mesh points have changed.
  • usd#1483 - Indexed normals with vertex interpolation are now converted properly.
  • usd#1462 - Ensure shader scope doesn't appear twice in the hierarchy.
  • usd#1477 - Fix the motion blur with interframe geometry samples in the render delegate
  • usd#1477 - A a note in the README for the flickering issue with instances which can be fixed with the USD_ASSIGN_PROTOTYPES_DETERMINISTICALLY environment variable.
  • usd#1426 - Skinned transforms are now correctly used on the skinned meshes.

[7.0.0.1] - 2021-11-24

Bugfixes

Build

  • #923 Testsuite fails with Arnold 7
  • #1487 Update Scons to build on windows with MSVC 14.3

Procedural

  • #458 Point instancer should prune the primitives under its hierarchy
  • #904 No way to have Point Instancer prototypes hidden
  • #921 Remap curves primvars to avoid "wrong data count" errors
  • #928 Transform from the Point Instancer is not applied to instances

Imaging

  • #902 Render session is not passed to AiDeviceAutoSelect
  • #900 Avoid calling AiRenderBegin if render is already running
  • #905 Integer primvar Render Vars fail to render via husk
  • #906 Version is not set as default when returning SDR definitions
  • #915 Volume shader is not applied to the ArnoldVolume primitive in Hydra
  • #918 Rendervars do not show up in Houdini 19

Scene Format

  • #924 Writer now saves the default color manager node

[7.0.0.0] - 2021-10-18

Enhancements

Build

  • ARNOLD_ prefix for definitions: Arnold-USD now uses ARNOLD_ prefix for definitions to differentiate from core definitions. (#823)
  • CMake testsuite: The cmake build system is now capable of running tests via kick and usdrecord. (#124 #27)
  • BOOST_ALL_NO_LIB: When building via CMake, the implicit linking of boost libraries can be disabled.

Procedural

  • Procedural Path Mapping: The procedural now supports Arnold Path Mapping when loading USD files. (#818)
  • Light Linking: The procedural now supports light linking. (#787)

Imaging

  • UsdImaging adapters: Arnold-USD now includes a set of UsdImaging adapters for Arnold specific schemas, that allows direct use of procedurals and Arnold shapes in Hydra. (#185 #741)
  • Deep rendering: The render delegate now supports rendering of deep AOVs via DelegateRenderProducts. (#650)
  • Hydra scene delegate: Arnold-USD now includes an experimental scene delegate for Hydra. (#764)
  • Progressive disabled when using Husk: Progressive rendering is now disabled when rendering via husk. (#755)
  • Custom PrimID Hydra Buffer: The render delegate now uses a dedicated primId AOV to support selections in Hydra viewports. This improves support for render-time procedurals and leaves the built-in id parameter unchanged on shapes. (#812)
  • DoubleSided in the Render Delegate: The render delegate now supports the built-in doubleSided parameter on USD primitives and correctly supports overrides via Arnold-specific primvars. (#805)
  • Motion Blur using Velocity and Acceleration: The render delegate now extrapolates point positions if velocity or acceleration primvars exist and there are no multiple samples for the position. (#673)
  • Fast camera updates: The render delegate now handles camera-only updates more efficiently, improving the first time to pixel. (#869)
  • Standard Surface Fallback: The render delegate now uses a standard surface as a fallback, when no materials are assigned to a prim. (#861)
  • String array parameters: String array primvars are now converted to built-in parameters. (#808)
  • Multiple hydra sessions: The render delegate now uses the multiple render session API. (#783)

Scene Format

  • Multiple frames in a single file: The USD writer is now able to append multiple frames to a single USD file. (#777)

Bugfixes

Build

  • #746 Issue with dependency between the procedural build and the testsuite
  • #810 Can't build schemas when there are spaces in the project folder path
  • #830 HdArnoldNativeRprim::GetBuiltinPrimvarNames lacks the override modifier
  • #835 Building for USD 21.08 fails because the lack of SdfTypeIndicator
  • #837 Schemas fail to generate with python 3 because of dict.iteritems()
  • #845 Driver using AiOutputIteratorGetNext fails to compile when using a newer Arnold build
  • #851 Don't configure plugInfo.json in-source
  • #849 AiArrayGetXXXFuncs are not available anymore in newer Arnold builds
  • #856 Cleanup solution introduced in #845
  • #874 Allow to prepend PATH folders when building schemas
  • #772 Testsuite fails when using USD 21.05/21.02
  • #765 Can't compile when using USD 21.05
  • #775 Remove deprecated functions, warnings, and fix some bugs
  • #767 Unable to compile using cmake with a Python 3 build of USD
  • #792 Build error using Houdini 18.0 on OSX

Procedural

  • #847 Procedural should check the camera of the proper universe for motion blur settings
  • #802 B-spline curves not using radius in procedural
  • #816 The procedural does not use "driver:parameters:aov:name"

Imaging

  • #751 Render delegate crashes when changing material terminals interactively
  • #797 Warning messages when HdArnoldRenderPass is deleted
  • #858 Can't hide/unhide lights in Hydra
  • #853 Missing indices for facevarying primvars in Hydra abort renders
  • #821 The render delegate crashes when using render session API
  • #884 Render delegate shouldn't call AiBegin/AiEnd if Arnold is already active
  • #843 Disabling render purposes does not hide geometries in hydra
  • #887 Int parameters are not converted to unsigned int shader parameters in the render delegate
  • #761 Change render_context string to RENDER_CONTEXT for render hints

Scene Format

  • #871 Enforce writing multiple frames when no default is authored

Schemas

  • #798 SdfMetadata Clashing with another NdrDiscovery Plugin

[6.2.1.1] - 2021-06-07

Bugfixes

Procedural

  • #778 Procedural doesn't read some animated parameters properly
  • #768 Custom typed primitives are not written if they already exist

Render Delegate

  • #795 GfMatrix4d attributes are not converted to AI_TYPE_MATRIX parameters
  • #790 Reset the disp_map parameter instead of setting nullptr when there is no displacement

[6.2.1.0] - 2021-04-22

Enhancements

Build

  • Common Library: Arnold-usd now includes a set of common functions and string definitions to share across multiple modules. (#466)

Procedural

  • Half and Double precision: Storing data using half or double precision is now supported. (#672)
  • Velocity blur: The procedural now uses the velocity attribute to create motion keys for point-based shapes, when there are no position keys or the topology changes between frames. (#221)
  • NodeGraph schemas: The procedural now supports using the NodeGraph schema for shader networks. (#678)
  • Crease Sets: The procedural now supports crease sets on polymesh. (#694)
  • Purpose: Usd Purpose is now supported in the procedural. (#698)
  • Transform2D: The procedural now supports remapping UsdTransform2D to built-in Arnold nodes. (#517)
  • Multi-Threading: The procedural now uses USD's WorkDispatcher which improves the performance of multi-threaded expansion in many cases. (#690)

Render Delegate

  • Half and Double precision: Storing data using half or double precision is now supported. (#669)
  • Light and Shadow linking: The render delegate now supports light and shadow linking. (#412)
  • Motion blur for the Point Instancer: The render delegate now calculates motion blur when using the point instancer. (#653)
  • Pause and Resume: Pausing and resuming renders are now supported in the render delegate. (#595)

Scene Format

  • Write with default values: The scene format now supports optionally writing parameters with default values. (#720)

Schemas

  • Removal of the ArnoldUSD DSO: The Schemas now work without generating a C++ library. This simplifies the build process and removes the need of installing DSOs that are not used. (#705)

Bugfixes

  • #715 Initialization order issue with constant strings common source file

Build

  • #656 Arnold-USD fails to build with USD 21.02
  • #663 render_delegate/lights.cpp fails to compile for pre-21.02 on windows
  • #692 The render delegate fails to build on Windows due to template parameter names
  • #707 Schema generator scons should use USD_BIN instead of USD_LOCATION + bin to find usdGenSchema
  • #722 Failing to generate schemas when targeting Houdini on macOS
  • #730 Translator fails to build when targeting USD 20.08

Procedural

  • #674 Testsuite fails after standard_surface default changes in 6.2.0.0
  • #564 Changing topology only works when rendering the first frame of the USD file
  • #681 Read render settings at the proper frame
  • #683 Don't apply skinning if the usdStage comes from the cache
  • #508 Nested procedurals ignore matrix in the viewport API
  • #687 Crash with empty primvar arrays
  • #679 Attribute subdiv_type should have priority over usd subdivisionScheme
  • #282 Primvars are not inherited from ancestor primitives
  • #215 Issue with instanced primitives' visibility
  • #244 Curves with vertex interpolation on width
  • #732 Support wrap, bias and scale in USdUvTexture
  • #724 ID not passed to the shapes generated in the procedural

Render Delegate

  • #651 Error rendering USD file with samples in productName
  • #660 Crease sets and subdivision scheme is not imported correctly
  • #727 Arnold does not use wrapS and wrapT values on UsdUVTexture shader node when rendering UsdPreviewSurface
  • #759 Primvars are not correctly set on the instancer if there is more than one prototype

Scene Format

  • #615 USD Writer crashes when node name contains hyphen character
  • #718 Inactive render vars are still rendered when using the scene format

[6.2.0.1] - 2021-02-11

Bugfixes

Render Delegate

  • #654 Transform is not synced for the points primitive

[6.2.0.0] - 2021-01-28

Enhancements

Build

  • USD Procedural Name: It is now possible to overwrite the USD procedurals name, which allows deploying a custom USD procedural alongside the core shipped one. (#600)

Procedural

  • Cache Id: The procedural now supports reading stages from the shared stage cache via the cache id parameter. (#599)
  • Per ray-visibility: The USD procedural now supports per-ray visibilities exported from Houdini. (#637)

Render Delegate

  • Hydra Cameras: The render delegate now supports physical camera parameters, including depth of field and Arnold specific camera parameters. (#31 #591 #611)
  • Search Paths: The render delegate now exposes search paths for plugins, procedurals, textures, and OSL includes. (#602)
  • Autobump Visibility: The render delegate now supports setting autobump_visibility via primvars. (#597)

Scene Format

  • Authoring extent: Extents on UsdGeom shapes are now correctly authored when using the USD scene format. (#582)

Schemas

  • Prefix for Schema Attributes: Arnold schemas now prefix their attributes for better compatibility with built-in USD schemas. (#583)
  • Inheriting from UsdGeomXformable: Arnold schemas now inherit from UsdGeomXformable instead of UsdTyped. (#558)
  • Creating XForms: The USD scene format now correctly creates UsdGeomXform parents for shapes instead of UsdTyped. (#629)

Bugfixes

Build

  • #624 CMake fails building schemas for a beta Arnold build.
  • #641 The render delegate fails to build using gcc 4.8.5 .

Procedural

  • #621 UVs not read from facevarying primvar if indexes are not present.
  • #643 Don't error out when a procedural object_path points at an inactive primitive.

Render Delegate

  • #592 Invalid face-varying primvars crash the render delegate.
  • #481 std::string, TfToken, and SdfAssetPath typed VtArrays are not converted when setting primvars.
  • #619 Several built-in render buffer types are not translated to the right Arnold AOV type.
  • #634 Fixing disappearing meshes when playing back animation.
  • #638 Motion start and motion end is not set reading animated transformation.
  • #605 Issues with UVs when rendering the kitchen scene.

Scene Format

  • #596 Invalid USD is produced if polymesh is made of triangles and nsides is empty.

[6.1.0.0] - 2020-10-28

Enhancements

Build

  • Installing license: The license is now copied to the installation folder when using scons. (#540)

Procedural

  • Light Shaping: The procedural now supports the UsdLuxShapingAPI, allowing the use of spot and IES lights. (#344)

Render Delegate

  • UsdTransform2d: The render delegate now supports the UsdTransform2d preview shader. (#516)
  • Per face material assignments: Per-face material assignments are now supported. (#29)
  • Render Stats: The Render Delegate now returns render stats via GetRenderStats. For now, this is used to show render progress in Solaris. (#537)

Schemas

  • Schema for custom procedurals: The schemas now include ArnoldCustomProcedural for describing custom procedurals. (#487)
  • Schema updates: Schemas now support cameras, render settings, and new output types. (#500)

Scene Format

  • Parent Scope: There is a new flag to specify a custom root for all exported prims. (#292)
  • ST for Texture Coordinates: Texture coordinates are now written as primvars:st to match the USD convention. (#542)

Bugfixes

Build

  • #528 Render delegate fails to build when building for Katana.
  • #553 Compilation failures because of License.md.
  • #567 HdArnoldMaterial fails to compile for the latest USD dev branch.
  • #560 plugInfo.json for schemas is broken with newer USD builds.

Procedural

  • #513 Viewport representation in points mode doesn't have the correct matrix.
  • #543 Visibility is not checked on the current frame.
  • #556 motion_start and motion_end is only set if the matrix of the prim is animated.
  • #565 Animated transforms not translated properly if set on parent xforms.
  • #570 USD procedural is not picking up osl shader parameters.

Render Delegate

  • #569 Render delegate not picking up OSL shader parameters.
  • #577 Point light should have zero radius.
  • #580 The Render Delegate's depth range is incorrect if USD is at least version 20.02.
  • #570 Incorrect display of curve widths in Solaris when changing curve basis.

[6.0.4.1] - 2020-10-01

Enhancements

Build

  • Custom Build Directory: BUILD_DIR can now be used to overwrite the build directory for scons builds. (#490)
  • New Scons Version: The build is now using Scons-3.1.2. (#549)

Bugfixes

Build

  • #533 Add BOOST_ALL_NO_LIB when building on windows.
  • #501 The render delegate fails to build on gcc-4.8.5/Linux.
  • #498 Can't build for Katana on Windows.

Procedural

  • #513 Viewport representation in points mode doesn't have the correct matrix.

Render Delegate

  • #488 Render Settings are not passed to the Render Delegate when using Husk.
  • #518 HdArnold does not correctly handle texture coordinates when the primvar is not name st and varname in PrimvarReader_float2 is of type string.
  • #530 Cylinder light not matching the viewport preview.

[6.0.4.0] - 2020-08-05

Enhancements

Build

  • 20.08 Support: Building for USD 20.08 is supported.

Procedural

  • UsdRender schema: UsdRenderSetting, UsdRenderProduct and UsdRenderVar are now supported in the procedural. (#453)

Render Delegate

  • Improved Solaris Primvar support: Primvars with arrays of a single element are converted to non-array user data in Arnold. This improves primvar support in Houdini Solaris. (#456)
  • Basis Curves: The Render Delegate now supports rendering of Basis Curves. Overriding the basis parameter via primvars and periodic/pinned wrapping are not supported. (#19)
  • Per instance primvars: Instancer primvars are now supported, with the exception of nested instancer primvars. (#478)
  • Overriding the default filter: HDARNOLD_default_filter and HDARNOLD_default_filter_attributes can now be used to overwrite the default filter. (#475)

Bugfixes

Procedural

  • #463 Texture coordinates of texcoord2f type are not read correctly

Render Delegate

  • #475 The closest filter is used for AOVs without filtering information

[6.0.3.1] - 2020-06-04

Build

  • Testing the Scene Format: The testsuite now includes tests for the Scene format plugin. (#157)

  • Hiding symbols: Weak symbols are now hidden in the Procedural on Linux and MacOS. (#409)

  • Lambert for the Tests: The testsuite is now using the lambert as the default shader. (#416)

  • Overwriting the C++ standard: The C++ standard can now be overwritten for builds on Linux and MacOS. (#446)

  • Google Test: Google Test can now be used to write tests. (#311)

  • Fixed an issue with the "resave" test parameter. (#402)

  • Fixed an issue with test 62 and 68. (#414)

Procedural

  • UsdGeomCamera: The UsdGeomCamera schema is now supported in the procedural. (#345)

  • UsdSkel: The UsdSkel schema is now supported in the procedural. (#329)

  • Image uvset: The built-in uvset is used now when a UsdPrimvarReader for st/uv is connected to UsdUvTexture. (#428)

  • Textured Mesh Lights: Textured mesh lights are now supported. (#366)

  • Fixed an issue when using multiple Procedurals. (#400)

  • Fixed issues with Nested Procedurals when using the Procedural Viewport API. (#408 #435)

  • Fixed a crash with empty node names. (#380)

  • Fixed an issue with reading namespaced primvars. (#382)

  • Fixed an issue when reading Light color and intensity parameters. (#364)

  • Fixed several issues when reading primvars. (#333)

  • Fixed an issue when reading RGB arrays. (#325)

Render Delegate

  • Filters for AOVs: Filtering parameters are now read from the aovSettings map for RenderVars. (#319 #426 #437)

  • LPE RenderVars: LPE RenderVars are now supported. (#317)

  • Primvar RenderVars: Primvar RenderVars are now supported. (#318)

  • SourceName for RenderVars: The sourceName aovSetting is now supported. This allows renaming Arnold AOVs and writing a single AOV to multiple Render Buffers with different filters. (#425)

  • Fixed an issue that prevented using the GPU on Windows. (#398)

  • Fixed a crash when running the Render Delegate in Solaris on Windows. (#394)

  • Fixed a bug related to marking ignored Render Buffers as converged. (#431)

  • Fixed an issue related to using incorrect LPEs. (#430)

  • Fixed a crash when deleting an active RenderVar in Solaris. (#439)

  • Fixed an issue when the USD Preview Surface is used as a Displacement shader. (#448)

  • Fixed an issue with how the dataType parameter is interpreted. (#450)

Scene Format / Writer

  • Roundtripping Node Names: Node names are now preserved when roundtripping scenes from Arnold to USD to Arnold. (#396)

  • Per-channel connections: Per-channel connections are now written using adapter nodes. (#351)

  • Motion Keys: Motion keys are now written to the USD file. (#334)

  • Motion Blur: Motion blur is now supported. (#346)

  • Fixed an issue when writing Toon light lists. (#374)

  • Fixed an issue when writing linked ramp parameters. (#375)

  • Fixed an issue when writing AI_TYPE_NODE user data. (#371)

  • Fixed an issue when writing motion ranges. (#368)

  • Fixed an issue when writing ginstance parameters. (#362)

  • Fixed a crash when writing empty arrays. (#360)

  • Fixed an issue when the number of motion keys for normals did not match the number of motion keys for positions. (#356)

  • Fixed an issue when writing custom Matrix parameters. (#354)

  • Fixed an issue when writing polymesh.subdiv_iterations.(#349)

  • Fixed an issue when writing curves.num_points. (#324)

  • Removed warnings when writing the displayColor primvar. (#312)

[6.0.3.0] - 2020-04-20

Build

  • USD requirement: USD 19.05 is now the earliest supported version.

  • USD 20.02: USD 20.02 is now supported. (#260)

  • Fixed build issues on Linux and MacOS. (#303)

  • Fixed build issues when using USD 0.19.05.

Procedural

  • Using the new instancer procedural: The procedural now uses the core shipped instancer procedural. (#256)

  • Prim Visibility: The visibility token from UsdGeomImageable is now correctly inherited. (#218)

  • Fixed a crash when using the Arnold Viewport functions. (#295)

  • Fixed a crash when writing USD files with upper-case extensions. (#288)

Render Delegate

  • Computed Primvars: Computed primvars are now supported, enabling previewing UsdSkel and Houdini crowds. (#265 and #267)

  • Improved Rendering: The Render Delegate is now using the Arnold Render API correctly, leading to better responsiveness. (#270)

  • Improved Render Buffers: The Hydra Render Buffer support is now significantly improved, including improved performance. (#8)

  • 32-bit buffers: The render delegate now outputs 32-bit float buffers, instead of dithered 8 bit whenever possible. (#9)

  • arnold:global: prefix: Prefixing Render Settings with arnold:global: is now supported.

  • Shaping Parameters: Shaping parameters on Sphere Lights are now supported. This includes Spot and IES parameters, excluding IES normalize and IES angle scale. (#314)

  • Barndoor Parameters: Solaris' Barndoor parameters are now roughly approximated using the barndoor filter. Note, Arnold does NOT match Karma. (#332)

  • Fixed a crash when instancer nodes had uninitialized node pointers. (#298)

  • Fixed a bug with aborted renders not marking the render pass as converged. (#4)

  • Fixed a bug where the camera jumped to the origin in Solaris. (#385)

Scene Format/Writer

  • Mask: The scene format plugin now supports a mask parameter, allowing selective export of Arnold nodes. (#274)

  • Closures: Closure attributes are now written to the USD file. (#322)

  • Options: The options node is now correctly translated. (#320)

  • Fixed bugs with the string export functions. (#320)

  • Fixed a crash when writing pointer attributes. (#342)

[6.0.2.1] - 2020-03-11

Build

  • Clang 9: We now support building using Clang 9. (#252)

Procedural

  • Primvar translation: The procedural now uses "primvars:st" and "primvars:uv" for UV coordinates, and "normals" for "nlist" on polymeshes. (#206)
  • Per-vertex UV and Normals: Per-vertex UVs and normals are now supported on polymeshes. (#222)
  • Shader output connections: Support for shader output connections has been improved, including per-component connections. (#211)
  • Point varying primvars: Varying primvars are now supported on point schemas. (#228)
  • USDVol support: The procedural now supports USD Volumes schemas. Using grids from two different files for a single volume is not allowed. (#227)
  • Serialized USD: The procedural supports creating the stage from a set of strings without requiring a file. (#235)
  • Basis Curves: The procedural now supports Basis Curves. (#239)
  • Boolean parameters: The procedural now supports setting boolean parameters on Arnold nodes using bool, int or long USD attributes. (#238)
  • Converting between Width and Radius: Width attributes are now properly converted to Arnold's radius parameters. (#247)
  • RTLD_LOCAL: RTLD_LOCAL is used instead of RTLD_GLOBAL when dlopening in the procedural. (#259)

Render Delegate

  • Left Handed Topology: Left-handed topologies are now supported, including converting the varying primvars and indices for position, normal and uv attributes. (#207)
  • Motion Key mismatch: Normal and position motion keys counts are the same now. (#229)
  • RGBA Primvars: RGBA primvars are now supported. (#236)
  • Hydra Point Instancer: Support of the Point Instancer has been greatly improved, including instancing of volumes. (#18 and #123)
  • Uniform Primvars: Uniform primvars on points are now supported.
  • Pixel format conversion: The render buffers now converts between pixel formats correctly. (#245)
  • Light Dirtying: Transforms are now correctly preserved when parameters are dirtied, but transforms are unchanged on lights. (#243)

Schemas

  • Linux Build: Building schemas using Arnold 6.0.2.0 is now supported on Linux. (#219)

Writer

  • Node names for attributes: Node names are now correctly formatted and sanitized when writing node and node array attributes. (#208)