![]() Print("\nPostLookFileMaterialsOut callback")Ĭallbacks.addCallback(, cbPrePrint)Ĭallbacks.addCallback(, cbPostPrint) Print("\nPreLookFileMaterialsOut callback") Callback function executors and handlers are documented for both LookFileBake and LookFileMaterialsOut nodes in the Katana Developer Guide.īelow is an example Python script that can be run in the Python tab to define and add two callbacks of the new types that, on execution, print the Look File's Asset ID and the name of the node doing the Look File writing. These are similar to the existing and, only they are triggered before/after a Look File is written by a LookFileMaterialsOut node rather than by a LookFileBake node. Renderers that don’t support these features are still usable with Katana, but they don’t leverage its full benefit.ID 502961 - Two new types of callback have been added: and. ass files, for each frame before rendering starts. ![]() In addition, deferred evaluation significantly simplifies pipelines by removing the need to write large scene data files such as RenderMan. ![]() Through this approach, very large scenes are easier to manage, and the resources needed to deal with them are reduced. At render time, they are passed scene descriptions in the form of a procedural recipe to be run inside the renderer. These are often called deferred evaluation and are able to recursively call other procedurals. Many renderers support procedurals that can be evaluated on demand. ![]() Scalability is also at the heart of rendering in Katana. Currently, Katana ships with the 3Delight renderer and accompanying renderer plugin, and an API that allows developers to support other renderers. The renderer connects to Katana through a renderer-specific plug-in. ![]() When it comes to rendering, Katana’s renderer-agnostic nature provides the flexibility to allow CG supervisors and pipeline engineers to select the appropriate renderer for the show or shot. Solving both problems was essential for dealing with the demands of highly complicated modern productions. Katana was developed from the ground up to address the problems of scalability and flexibility. ![]()
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