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Pixar RenderMan (formerly PhotoRealistic RenderMan) is proprietary photorealistic 3D rendering software produced by Pixar Animation Studios.Pixar uses RenderMan to render their in-house 3D animated movie productions and it is also available as a commercial product licensed to third parties. In 2015, a free non-commercial version of RenderMan became available. Quick Introduction. RenderMan for Maya (RfM) is a Maya plugin distributed with RenderMan. RfM allows us to render in Maya using the renderer RenderMan Pro Server (PRMan). PRMan provides two renderers: Reyes and RIS (Rix Integration Subsystem).RIS is the latest and greatest renderer which provides high quality raytracing. RenderMan is fully capable of delivering high-resolution animation for VR, including the new omnidirectional stereo. Simply render with the VR camera. In live action film, motion blur is the result of objects moving during the exposure of the. Quick video walking through the process installing and starting RenderMan for Blender. Here's some useful links: Download Blender: https://www.blender.org/do.

RenderMan for Maya is installed using the RenderMan Installer, which manages the downloading, installation and licensing of RenderMan Pro Server (the actual renderer) along with RenderMan for Maya and/or RenderMan for Katana.

On Windows and OS X, the installer configures RenderMan for Maya. After installing, you should be good to go. Start Maya, and RenderMan for Maya should appear in the Plug-in Manager's list of plug-ins.

On Linux some manual configuration is necessary (see below).

On Windows and OS X you do not need to manually configure the RenderMan for Maya plug-in. The following instructions are for advanced users.

Rendering with Xgen

Please note that users may need to set the correct path variables for Xgen to render.

  • %MAYA_PATH%/bin
  • %MAYA_PATH%/lib
  • %MAYA_PATH%/plug-ins/xgen/bin
  • %MAYA_PATH%/plug-ins/xgen/lib
  • %RMANTREE%/lib;

Where MAYA_PATH is your installed location of Maya for your operating system (OS). See the table below where to add these paths based on your OS.

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For example, on Windows you might have the following path: C:Program FilesAutodeskMaya2018

When updating/changing versions you may need to reset/remake your Maya Preferences if the above settings no longer work.

For each OS below it should be added to the following system environment variables:

Environment Variable
Windows
Linux
OSX

Note that Interactive Groomon Xgen introduced in Maya 2017 is not currently supported. It must be baked/exported as an Alembic cache before rendering.

  • A RenderMan_for_Maya.module file must contain the path to the RenderMan for Maya installation.
  • Maya must find the RenderMan_for_Maya.module file in one of the locations that it searches for modules.
  • Maya's command line Render command requires rmanRenderer.xml to be found by Maya.

On Windows and OS X, the installer takes care of these, but if for some reason they need to be adjusted, read on.

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Install Location

Examples of the default install location of RenderMan for Maya:

Examples of the default install location of RenderMan Pro Server:

Windows
OS X
Linux
RenderMan for Maya requires RenderMan Pro Server, which supplies the actual rendering engine.

RenderMan for Maya respects environment variables called RMSTREE and RMANTREE, which can be used to specify the location of the RenderMan for Maya and RenderMan Pro Server installations. If these variables are not set they are inferred.

Module Location

These are examples of where the RenderMan_for_Maya.modulefile can go so that Maya will find it (adjust versions as necessary):

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Alternatively, you can put the module file in a non-standard location and set the MAYA_MODULE_PATH environment variable. Run getenvMAYA_MODULE_PATH in Maya's Script Editor to see the standard locations that Maya checks for modules.

Module Contents

The module file should contain a path to the install location. These are examples of the contents of the file on different platforms (adjust versions as necessary):

Windows
OS X
Linux

Note, on OS Xbatchrenders using XGen may require the DYLD_FALLBACK_LIBRARY_PATH to be set, and this can happen via the module file or as an environment variable.

Render Command

For Maya's Render command to work with RenderMan, you need to copy or symlink $RMSTREE/etc/rmanRenderer.xml into Maya's rendererDesc directory.

e.g.

Alternatively, you can set the MAYA_RENDER_DESC_PATH environment variable topointatthedirectory where it can find rmanRenderer.xml.

RenderMan for Maya is not listed in Maya's Plug-in Manager

Maya did not find the RenderMan_for_Maya.module file or the path listed inside the RenderMan_for_Maya.module does not point at a valid install of RenderMan for Maya.

  • Check that the module file is in one of the locations returned when you type 'getenvMAYA_MODULE_PATH' in Maya's Script Editor.
  • Check that the path inside the file looks correct and that the install directory actually exists. The RenderMan_for_Maya plug-in must be present in the plug-ins directory under the install location. Note, Maya knows to look intheplug-inssub-directory of the installation. The path listed in the module file should not actually include the plug-ins sub-directory.

RenderMan for Maya won't load

You see either of these errors:

// Error: file: C:/Program Files/Pixar/RenderManForMaya-21.0-maya2016/scripts/rmanLoadPlugin.mel line 27:
Unable to dynamically load : C:/Program Files/RenderManForMaya-21.0-maya2016/plug-ins/RenderMan_for_Maya.mll

A common reason for this error is attempting to load the plug-in into the wrong version of Maya. Check that the version in the error string matches the version of Maya you are running. Especially if you have multiple versions of Maya installed, the RenderMan Installer may have only downloaded the plug-in for your newest version of Maya.


The RenderMan Tools

RenderMan for Maya

RenderMan for Maya (RfM) provides easy access to RenderMan features via either a Maya-centric workflow (including Maya-style pattern nodes, etc.) or in conjunction with the other tools. The plugin also connects Maya with RenderMan Pro Server, through its RIB-out functionality and advanced integration with the renderer. RfM provides seamless access to RenderMan's speed, power, and stability for Maya users, who can maintain a simple, Maya-centric workflow, or take advantage of the plugins' flexibility to create an optimal, customized pipeline.

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RenderMan for Maya requires the installation of RenderMan Pro Server as well as the RfM plugin in order to function correctly. The RenderMan installer does this automatically.

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'it'

'it' is a robust framebuffer/render view window, offering complete floating point support and a powerful and flexible catalog, as well as a fast and powerful imaging tool that is capable of production-quality image manipulation and compositing usually found only in high-end standalone products. Thanks to its integration with the plugin and an all-new Python scripting interface, 'it' gives users the ability to incorporate sophisticated post-render image operations into their rendering pipeline.

RenderMan Features


RenderMan for Maya supports advanced rendering features that are not native to Maya. Because these advanced features are not supported directly by Maya, RfM provides its own techniques for creating and controlling these effects. These techniques are usually as simple as attaching and configuring RenderMan-specific attributes to geometry, lights, and/or materials. Photo Realistic RenderMan (PRMan) is designed to be fast and easy to use while generating production-quality renders and global illumination works out of the box and interactive rendering provides rapid iteration for artists.

Analytic Area Lights

Area Lights are a powerful way to create physically accurate lighting while optimizing sampling budgets and, in turn, performance. PRMan's area lights support light filters, as well as light-linking, groups, per-group AOVs, and IES profiles and portals.

With the UI changes in Maya 2016.5, you must set your Viewport Rendering Engine to 'OpenGL - Legacy' to see RenderMan Manipulators correctly. You can find this in Maya: Windows > Preferences > Display - Viewport 2.0

Global Illumination

Sometimes called 'Indirect Illumination,' RenderMan for Maya supports Global Illumination effects, subtle diffuse shading effects that are created by sampling the lighting of a scene many times from a given point. This technique can yield highly realistic results. Occlusion, which merely samples the 'coverage' of a point (and is cheaper than Indirect Illumination), is also supported automatically or through the PxrOcclusion Integrator.

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Volume Rendering

RfM includes PRMan's first class volumetric rendering capabilities, enabling the creation of volumetric effects, including Maya's Fluid Effects, with full PRMan support - motion blur, multi-scattering, non-homogenous, etc.

True Curved Surfaces

Tessellation settings are never an issue with RenderMan when rendering NURBS and subdivision surfaces. Since RenderMan renders true curved surfaces, NURBS and subdivision surfaces will never have faceting artifacts. Maya's tessellation mode settings are simply ignored and the benefits of RenderMan are immediately realized.

Subsurface Scattering

RenderMan for Maya supports subsurface scattering, an important effect for realistically rendering translucent materials, like skin, flesh, fat, fruits, milk, marble, and many others. Subsurface scattering is responsible for effects like color bleeding inside materials, or the diffusion of light across shadow boundaries. RfM includes support for ray-traced subsurface scattering through materials shipped with RenderMan.

Secondary Outputs

RenderMan for Maya supports secondary outputs (AOVs, or Arbitrary Output Variables), which can be any arbitrary information contained in a shader. Users may also take advantage of Light Path Expressions (LPE) for powerful control over outputs.

Studio Quality RenderMan Shaders

RenderMan ships with the same shaders use by Pixar on their feature films. This allows artists to bring the full power of RenderMan to their projects, providing a higher level of control than what is possible using Maya's built in materials.

Ri Procedurals

As the foundation of a RIB-based pipeline, RenderMan for Maya supports all manner of procedurals. Additionally, RenderMan for Maya provides simple support for procedurals via a MEL script attribute either on a shared geometric attributes node or directly on a transform or shape node.

Down the Pipe(line)

RenderMan for Maya is one piece of a potentially sophisticated production pipeline. In order to get your work from script-to-screen you may need more, and that is where Tractor and RenderMan Pro Server enters the picture. By implementing RfM in concert with Tractor and RenderMan Pro Server (RPS), users can achieve a seamlessly integrated rendering workflow from desktop to renderfarm.

Tractor

Tractor is a system for distributing tasks from queued jobs across a network of compute servers. It includes a central queueing mechanism, a remote execution server, a monitoring subsystem, and a browser-based user interface. Tractor was designed as a high-performance replacement for Alfred and can be used in any work distribution capacity, but it is particularly well-suited for managing a RenderMan for Maya-to-RenderMan Pro Server pipeline.

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Tractor is provided as a separate, standalone product, with its own documentation.

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RenderMan Pro Server

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RenderMan Pro Server is the foundation of a high-performance rendering pipeline. It provides standalone implementations of the renderer and its corresponding rendering utilities as well as access to APIs that allow savvy users to extend functionality. As the core technology, RenderMan Pro Server is the font from which all pixels flow.