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Cryptomatte not precise enough
Closed, ArchivedPublic

Description

Operating system: Windows 7
Graphics card: GeForce 660 x2

Broken:
blender2.8 beta
0f5b53ba4dc
Worked:

Cryptomatte seems to be eroded or feathered inward, leaving a halo around the edge.

Exact steps for others to reproduce the error: Duplicate default cube multiple times, enable cryptomatte by object, enable 'Accurate Mode', render in Cycles with CPU. In the compositor, isolate a cube with the cryptomatte, use a color>multiply node to give it a color, and put it on top of the original image with an Alpha Over node. Observe halo.

Details

Type
Bug

Event Timeline

Brecht Van Lommel (brecht) closed this task as Archived.EditedSun, Dec 2, 1:06 AM
Brecht Van Lommel (brecht) claimed this task.

This is a limitation of Cryptomatte. While it does produce accurate masks, it does not have the information to separate colors accurately. For that something like Deep EXR would be needed.