Katana + RenderMan
Katana's powerful and flexible look development environment combined with RenderMan's state-of-the-art rendering technology come together to offer the user a remarkable out-of-the-box experience for for high-end lighting and rendering. RenderMan for Katana (RfK) provides seamless access to RenderMan's powerful rendering system for Katana users, who can take advantage of the plugin's flexibility to create an optimal, customized pipeline.
About the Plugin
The RenderMan plugin for Katana plays a dual role in a production pipeline; it is the bridge by which a user generates rendered images from a Katana scene as well as the provider of access to the tools for building the 3D elements within the scene. Although RfK is generally referred to as a "plugin" it is in actually a collection of plugins, nodes, macros and other tools which together allow the Katana user full access to the PRMan rendering system. Included in the RfK plugin package:
- Rendering plugin
- Renderer introspection plugin
- Device drivers for Preview and Live rendering
- GafferThree extensions for PRMan lights
- Viewer manipulators and modifiers for PRMan lights
- Macros for features such as Denoise and Holdouts
- Nodes for PRMan render configuration
- Tutorial scenes
There is no need to "load" the RfK plugin. Once it is installed and configured Katana will find the package automatically and load the various modules as needed.
Lighting and Shading
RenderMan ships with built-in production-quality shaders and lights, the same shaders and lights in use by Pixar Animation Studios on their feature films. Pixar shaders are loaded automatically at startup and available through the standard Material node or the PrmanShadingNode. Pixar lights can be created in GafferThree with a single key-stroke or directly via the menu. Mesh lights can also be created by simply selecting the geometry and creating a PxrMeshLight. Viewer Modifiers and Manipulators are also included for the built-in lights and light filters.
For more information, see the following documentation:
Live Rendering is iterative rendering where you can change parts of your scene and see it update in the render. Live rendering improves lighting and shading iteration. RfK supports offers the following features:
- Edits to material parameters
- Edits to attributes and transform of lights, including mesh lights.
- Object ID picker functionality during live rendering.
- Addition of lights (analytic and mesh) during live rendering.
- Live updates of renderSettings (ROI, cropWindow)
- Live updates of PrmanGlobalStatements (as supported by PRMan)
RenderMan For Katana supports studio customizations as much as possible.
Image Tool (it)
RenderMan includes "it", a robust framebuffer/render view window which offers complete floating point support and a powerful and flexible catalog. "it" is 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.
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 live rendering provides rapid iteration for artists. RenderMan for Katana supports all aspects of PRMan through both standard and PRMan-specific nodes.
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.
Sometimes called "Indirect Illumination," RenderMan for Katana 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.
RfK supports PRMan's first class volumetric rendering capabilities, enabling the creation of volumetric effects including 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.
RenderMan for Katana 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. RfK includes support for ray-traced subsurface scattering through materials shipped with RenderMan.
RenderMan for Katana 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.
Down the Pipe(line)
RenderMan for Katana 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 enters the picture. By implementing RfK in concert with Tractor and RenderMan Pro Server users can achieve a seamlessly integrated rendering workflow from desktop to renderfarm.
RenderMan Pro Server
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.