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RenderMan for Mari provides PxrSurface support in Mari 4.5+ and 5.0.

Where do you find this? When running the installer choose "Show All". We do not auto-detect Mari on your computer.

You can reference the Mari documentation on installation (note that this link is external to RenderMan and may change)

This is our first release, based on Pixar Animation Studio's internal toolset.
PxrSurface GLSL shader:
- Get a better preview of your work inside Mari.
- Most lobes are supported: Diffuse, Specular, RoughSpecular, Clearcoat, Iridescence, Fuzz, Subsurface (basic), Glass (basic).
- Presence support.
- Solo or mute any lobe.
- A large selection of texturable inputs have been exposed.
RenderMan menu offering a number of configurable shortcuts to speed up your workflow:
- Create a pre-configured PxrSurface with user-selectable channels.
- Switch to another pre-configured environment map.
- All these feature are user-configurable through json files.

The following features are not implemented:
- Point light support
- Specular anisotropy
- Per-lobe bump
- Clearcoat absorption.
- Subsurface scattering only supports the subsurface color and renders it as a diffuse lobe.
- All volumetric effects: subsurface scattering, single-scattering, glass absorption
Feature limitations
- It is impossible to perfectly match a RenderMan render (GLSL and Mari limitations).
- Transparency is not supported (Mari limitation).
- Roughness isn't a perfect match (Mari Limitation).

- Environment map switching doesn't work in Mari 4.5 (API bug) but is functional in the next release.
- Conditional visibility is not supported by Mari: all PxrSurface parameters are always visible.
- Nested parameter groups are not supported by Mari: all PxrSurface parameters groups are always visible.