RfB provides truly seamless access to RenderMan’s speed, power, and stability for Blender users, who can maintain a simple, Blender-centric workflow, or take advantage of the plugins’ flexibility to create an optimal, customized pipeline.

RenderMan for Blender includes two different denoisers, the RenderMan AI Denoiser from Disney Research (see Denoiser) and Nvidia’s AI Denoising solution.

Nvidia’s AI denoising is not available for macOS.

Interactive Rendering
For more information about using the Nvidia denoiser in “it”, refer to the “AI Denoise” section in Image Tool.

The RenderMan AI Denoiser currently does not work in XPU mode.

For interactive renders (viewport renders, IPR to “it”), you can turn on the denoiser by going to the viewport preferences and selecting one of the denoisers under IPR Denoiser. Optix refers to the Nvidia denoiser.

viewport_options-2.png

You should see immediate results with. the Nvidia AI denoiser, like below:

This is the result with the RenderMan AI Denoiser after two passes:

For the RenderMan AI Denoiser there are some additional controls:

Cheap First Pass: if checked, the first denoise pass will use a cheaper (slightly faster but lower quality) heuristic. This can be useful if rendering something that is converging very quickly and you want to prioritize getting a denoised result faster.

Min Samples: the minimum number of average samples per bucket before interactive denoising runs for the first time.

Interval: the time interval between denoising runs (in seconds). 

New Stylized Looks Nodes:

Added new nodes to the Stylized Looks toolset for creating stylized lighting and hatching effects.
Introduced PxrStylizedLightControl for artistic lighting effects within Pattern shaders, allowing independent control of light and shadow direction for effects like toon shading or hatching.
Added PxrStylizedLinesControl for generating stylized outlines and thin-line accents using curvature, edge detection, or user-supplied data.
Included two new nodes for hatching effects:
PxrStylizedHatchControl works within the shading network and supports screen-space and triplanar projections with eight layers of hatching textures.
PxrStylizedHatchingSampleXPU works across a frame and also supports screen-space and triplanar projections.
RenderMan XPU Improvements:

Enhanced performance and stability for the hybrid CPU/GPU render engine, RenderMan XPU.
Increased the maximum size of user attributes for rendering more complex assets with XPU.
Raised the number of channels per texture from 8 to 64.
Bug Fixes:

Included numerous bug fixes, particularly for RenderMan XPU. 

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