Arnold for Maya 5.1.3.1 - 2020-2023 + MacOSX + Linux

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Maya 2019, 2020 or 2022
Windows 10 or later, with the Visual Studio 2019 redistributable.
Linux with at least glibc 2.17 and libstdc++ 4.8.5 (gcc 4.8.5). This is equivalent to RHEL/CentOS 7.
macOS 10.13 or later.
CPUs need to support the SSE4.1 instruction set. Apple Mac models with M series chip are supported under Rosetta 2 mode.
GPU rendering works on Windows and Linux only and requires an NVIDIA GPU of the Ampere, Turing, Volta, Pascal, or Maxwell architecture. We recommend using the 470.74 or higher drivers on Linux and 472.12 (Quadro), 472.12 (GeForce), or higher on Windows. See Getting Started with Arnold GPU for more information.
Optix™ denoiser requires an NVidia GPU with CUDA™ Compute Capability 5.0 and above.
Maya Plugins Compatibility
MtoA 5.0.0.3 works with the following Maya plugins

Bifrost Extension for Maya 2.3.1.0
MayaUSD 0.13.0
Bug Fixes
Overscan not affecting renders - MTOA-942
ARNOLD-11945 - Crash when mixing transmission on overlapping meshes
ARNOLD-11728 - Performance regression on some scenes introduced in Arnold 7.0.0.0
ARNOLD-11282 - Curve face index assignment to 0xFFFFFFFF causing crashes
ARNOLD-11875 - [GPU] Disabling lights interactively only works once
ARNOLD-11844 - [GPU] Error when interactively loading scenes with an atmosphere
ARNOLD-11782 - [GPU] Crash with empty grids in OpenVDB files
usd#933 Set Product Metadata
usd#953 AiMsgSet functions need to be called with a render session
usd#942 AiResolveFilePath is not called with a procedural file type
usd#962 Reflections look broken on tessellated surfaces
usd#987 Lights and shadow links default ignoreRoots to false
usd#977 Support Curves UVs
usd#951 Extend the skinning baking interval to surrounding integer frames

MtoA 4.2.4 is a release addressing an issue with injecting ai_translator attrs in scenes (#mtoa-684).

This version uses the Arnold 6.2.1.1 core.

Arnold очень старинный рендер

EnhancementsIncompatible ChangesTicket
Summary
Ticket
Summary
#3906MacOS - Maya crashes with docked ARV and switching Viewport to Arnold#4049Cannot run kick on macOS#3122Light linking doesn't work with XGen#4052Maya triplanar projection node renders incorrectly#4060Changing cameras in Arnold Viewport is not triggering a re-render.#4064Adding second aiAxfShader to objects the AxF Filename and Texture Path is blank.#2876Attributes added to a set go under Arnold > Extra Attributes#3494MtoA - User added attributes appear under the Arnold tab, should be in Extra Attributes.#3834'Isolate Select' crashes when a shading node is deleted#3873Saving an image with a .mb extension crashes MtoA#3879Saving an image with the extension .hdr crashes MtoA#3950Arnold Render View crashes when isolate selecting bifShapes#3973deepexr crash when editing scene and Save Final Image enabled in ARV#4016Import materialx files as maya shading nodes#4031aiAfxShader does not appear in Hypershade node <tab> add node search.#4036AxF: failed to export error when adding AxF shader#4037AxF: no texture path provided error#40413D Manipulation capability in Arnold RVW has regressed#4042error with monochrome 8bit images processed to .tx#4044Set 8bit compression to dwaa#4048aiMotionVector custom AOV crash when merging_geometries#4051[ARV] Test resolution scales the image buffer#4053'Solid Angle' is still mentioned in the Help menu#4059Arnold crashes while making graph changes while bifShape was isolate selected in RVW#4062make licensing manager launch asynchronously#4065export radius_attribute fro alembics on aiStandIn#4066GPU Cache prepopulation error#3966template file navigation not intuitive#4008-seq does not work with arnoldRender command#4015[Import Arnold Shaders ] : Support connection where data types are not the same#4020Create MaterialX shader Node#4024export aiLookSwitch to include_graph / MaterialX#4033Export / Import shaders should support shading groups#4056add aov_write_vector shader

XGen motion blur was incorrect in Maya 2019
Fixed crash in the viewport when assigning aiStandardSurface to aiVolume
Support linking transmission_depth in aiStandardSurface
Fixed regression in wrapU and wrapV parameters of place2dTexture
Exposed maya batch render arguments for adaptive sampling
Fixed slowdown with many operators

Enhancements

• Faster GPU cache pre-population. 
• Arnold RenderView  now displays properly with High DPI monitors. 
• Improvements in the Operators UI for Standins / Alembic.
• Added option in ARV to clear the whole arnold session when IPR is stopped. When IPR is restarted, the whole scene is converted from scratch (as with Update Full Scene).
• aiUserDataColor now supports RGBA data, with an alpha channel.
• All matrix parameters in shaders can now be exported in motion blur
• Added more options for exported node names, to control the namespacing as well as the hierarchy separator
• MaterialX exporter allows to export hierarchy with slash separators, in order to work with exported alembic files
• Maya Playblasts can be generated from the Arnold Viewport. 

Bugfixes

• Fixed 3.2.0 regressions in Maya Ramp shading
• Fixed 3.2.0 regressions in Projection shader results
• Fixed 3.2.0 regression in Image plane when displayMode=None
• Fixed  vector displacement order with tangent maps

MtoA 3.2.0.2 is a hotfix release, that is binary compatible with 3.1 versions. It includes the following fixes:

- Fixed crashes with Arnold RenderView on MacOS
- Instancer and Mash nodes were freezing the render in MtoA 3.2.0
- Fixed Ramp gain linked to another shader
- Maya 2d textures weren't working in volumes
- Fixed crashes when disabling light nodes in IPR
- Fixed hangs when using "Isolate Selected" in Arnold RenderView
Ticket
#3765ARV crashes on Mac
#3750Instancer nodes freeze Maya when ARV updates and renders
#3755Maya Ramp links on colorGain not working
#3763Maya 2d textures not working in volumes

MtoA 3.2.0 is a major feature release, which is binary compatible with 3.1.* versions.

It includes the following improvements :

GPU Rendering (BETA):

You can now switch between CPU and GPU render devices interactively and expect visually similar results. NVIDIA GPUs from Turing to Maxwell architectures are supported, and Arnold will take advantage of multiple GPUs, NVLink and NVIDIA RTX hardware accelerated raytracing if available. Note that due to beta status of GPU rendering, a number of features are missing, performance is not final, and use in production is not advised. We plan to gradually improve this in subsequent releases and would appreciate your feedback.

Improved Sampling:
- Improved adaptive sampling : Adaptive sampling is now much more effective and predictable than before.
- Improved skydome sampling : Skydome light's sampling has been improved, in particular in darker areas. Note that existing scenes which were adjusted with previous versions of Arnold will now need to lower down the amount light samples for an equivalent result.
- Faster sample generation : Scenes with a high number of AA and light samples could take a very long time to start rendering. This is now much faster (some use cases went from 11 minutes to a fraction of a second, before the render starts).
Improved Shading:
- Microfacet multiple scattering : The GGX microfacet BSDF used in the standard_surface shader has been improved to account for multiple scattering between the microfacets, which is more physically correct and reduces energy loss on reflection, especially at higher roughness settings. The reflection from rough metals in particular will be significantly brighter and more saturated as a result.
- Improved randomwalk SSS : A new randomwalk_v2 SSS mode has been added that scatters more accurately and deeply through highly-transparent/optically-thin objects, which produces SSS with more saturated colors around fine surface detail and heavily backlit regions of an object
- Smart opaque : When using builtin shaders, arnold will now automatically set the opaque parameter in the shapes. Setting transparency only in the shaders will now be enough (exceptions are curves / points using min_pixel_width). Custom shaders can support this feature by setting metadatas opacity_term and transparency_term in the shaders.
- Improved bump and normal_mapping : bump and normal mapping now correct for non-physical shading normals (eg. extreme values) while preserving detail.
- Anisotropy controls for coat in aiStandardSurface
- Support for negative "Transmission Extra Roughness" in aiStandardSurface
- New aiUvProjection shader allows to do spherical / cubic / etc.. projections on a surface
- Exposing Arnold shaders aiCameraProjection, aiRampRgb, aiRampFloat, aiRgbaToFloat
Visible Lights:
- Area Lights and point lights can now be made visible to camera and transmission rays by increasing parameters camera and transmission
StandIns & gpuCache workflow improvements:
- New UI for shader assignments and overrides using arnold operators : A new UI in Standins and gpuCache allows to introspect nodes, assign shaders to specific elements, override parameters, etc… in a user friendly way. It will allow to create and edit operators attached to the Standin, that will therefore be portable across scene references.
- Standins can now load alembic files
- Show selected item in the viewport : While introspecting a Standin contents, selecting items will highlight them in the viewport. Picking in the Arnold RenderView will also select the corresponding item.
- New workflow for Standin's proxy geometries in the viewport : A new parameter ignoreGroupNodes will skip all the nodes below the Standin hierarchy for rendering. The desired proxy geometries just need to be parented to the Standin, and they will only appear in the viewport when this parameter is enabled.
- Subivision creases supported in Alembic
Export Shading trees as MaterialX files:
- New menu Export Selection to MaterialX allows to export the selected shading trees to a materialx document. It's also possible to append several looks to a single mtlx file and then to switch between both in the materialx operator. Geometrie's properties (subdivision settings, etc…) can also be baked to the file.
Operators:
- Added option to Export / Import operator graphs : New menu Export Operator Graph allows to export an operator graph to a .ass file (either the selection or the scene's graph). It's then possible to import it back to Maya, or even to another DCC.
- New include_graph operator : Includes an operator graph that was previously exported to .ass
Other:
- Improved workflow for motion vectors AOV : new attribute Instantaneous Shutter in the motion blur settings allows to get correct motion vectors AOV while rendering a still image. The shutter range will now be taken into account in the AOV.
- Faster .ass file writing : Writing to .ass, especially over Windows networks, can be dramatically faster (up to 51x reported)
- Faster OSL UDIM texture reads : Reading UDIM textures in OSL is now much faster (up to 10x reported)
- Disabled Swatch rendering by default, to avoid non-necessary excessive slowdowns
- Exposing "autobump visibility" in meshes to solve artefacts for objects appearing through sharp reflections / refractions.
- Updated to OIIO 2.1.0
Bugfixes:
- Fixes on triplanar used for displacement
- Adaptive sampling was being reset to OFF during IPR updates
- Interactivity optimizations when IPR is stopped
- Texture repeat wasn't working with custom uv sets
Incompatible Changes:
- Default specular_roughness in aiStandardSurface is now 0.2. Existing scenes that had left this parameter to its default value might now look different.
- Changes in skydome sampling require to lower down the skydome samples on existing scenes for an equivalent result and render times. For the same settings as before, the result will be less noisy but up to 30% longer.
- Removed support for NVIDIA Kepler GPUs
- Specular AOV: The sheen component has been removed from the specular AOVs
- Removed SSS on curves