kubakub regions from cryptomatte

Render a cryptomatte pass in your 3D tool (Blender, Houdini, C4D, Maya ...) and every object becomes a region with its real name from the scene (window_left_03). Objects named alike (window_left_01, _02 ...) share a group; a second cryptomatte layer (materials) adds tags for the plan rules. Also gives the render itself.

By kubakubkub·Created 15 days ago·Updated 3 days ago· 9

matrix
scope

regions
region_masks
regions_json
preview
render
report

◄file►

◄layerobject►

◄tag_layersmaterial►

◄exclude►

◄min_region_area64►

◄merge_small_regionstrue►

Categorykubakub/3d/from renders

Inputs (8)

Name	Type	Default	Description
file	STRING		Your multilayer EXR with the cryptomatte pass (32-bit): paste its path. Empty: a built-in sample EXR, so the node runs as it is.
layer	STRING	object	Which cryptomatte becomes the regions: object, material, asset, or the layer's full name.
tag_layers	STRING	material	Other cryptomatte layers whose names become tags (comma separated); e.g. material -> [tag:glass] in the plan.
exclude	STRING		Object names (wildcards) that are no regions.
min_region_area	INT	640–100000000	Objects smaller than this (pixels) are merged or dropped.
merge_small_regions	BOOLEAN	true	On: small objects join the neighbour with the longest border. Off: dropped.
matrixopt	IMAGE		Your matrix: its size is used (the render is resized) and it is the preview background.
scopeopt	MASK		Pixels outside this mask are never part of a region (the size of the matrix, or of the render without one).

Outputs (6)

Name	Type	Description
regions	KUBA_REGIONS	Label map + region table for the kubakub region nodes.
region_masks	MASK	One mask per region; batch index = region_id.
regions_json	STRING	The region table as text.
preview	IMAGE	Regions over the render (or the matrix).
render	IMAGE	The render's picture (Combined pass), sRGB.
report	STRING	Layers found, objects, groups and tags.