1b18e07232
The issue originates to the change in default view transform from Filmic to AgX, which does slightly different clipping, and clips color to black if there is any negative values. This change implements an idea of skipping view transform for viewer node when it is connected to the Pick output of the cryptomatte node. It actually goes a bit deeper than this and any operation can tag its result as a non-color data, and the viewer node will respect that. It is achieved by passing some extra meta-data along the evaluation pipeline. For the CPU compositor it is done via MetaData, and for the GPU compositor it is done as part of Result. Connecting any other node in-between of viewer and Cryptomatte's Pick will treat the result as color values, and apply color management. Connecting Pick to the Composite output will also consider it as color, since there is no concept of non-color-managed render result. An alternative approaches were tested, including: - Doing negative value clamping at the viewer node. It does not work for legacy cryptomatte node, as it needs to have access to original non-modified Pick result. - Change the order of components, and store ID in another channel. Using one of other of Green or Blue channels might work for some view transforms, but it does not work for AgX. Using Alpha channel seemingly works better, but it is has different issues caused by the fact that display transform de-associates alpha, leading to over-exposed regions which are hard to see in the file from the report. And might lead to the similar issues as the initial report with other objects or view transforms. - Use positive values in the Pick channel. It does make things visible, but they are all white due to the nature of how AgX works, making it not so useful as a result. Pull Request: https://projects.blender.org/blender/blender/pulls/122177
Blender
Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing, motion tracking and video editing.
Project Pages
Development
License
Blender as a whole is licensed under the GNU General Public License, Version 3. Individual files may have a different, but compatible license.
See blender.org/about/license for details.