Atlas Material

Derives per-channel material outputs (colour, alpha, roughness, height, normal, subsurface) from an atlas source as part of the atlas pipeline.

Part of the experimental atlas pipeline. The overall shape is settled but individual parameters may move. Detailed parameter prose is still being filled in.

Atlas Material is the per-channel material-derivation step in the atlas pipeline. It takes an atlas source and derives each material channel (colour, alpha, roughness, height, normal, subsurface) independently.

Each of the six channels is organised as a Derive pipeline: a Derive toggle decides whether the channel is computed, a source input points at where it is derived from, a render step writes it out, and an output path decides where it lands on disk.

Parameters

Material

Six per-channel folders: Colour, Alpha, Roughness, Height, Normal, Subsurface. Each has the standard Derive toggle, source input, render step, and output path.

The Alpha folder additionally exposes:

Parameter	Description
Chromakey Settings	Hue and saturation parameters for chromakey-based alpha extraction.
Connectivity Settings	Threshold for connectivity-based alpha extraction.

The Height folder exposes a Height Scale parameter.

The Normal folder exposes a Normal Map Scale parameter.

Render

Parameter	Description
Render All	Triggers a render across every enabled channel.

Render Settings

Parameter	Description
Cache Directory	Where outputs are written.
Name	Base filename for the outputs.
Format	Output texture format.
Per-channel output paths	Override the directory for individual channels.

Material Assignments

Parameter	Description
Override Material Assignment	Per-channel override toggle.
Override colour and label	Per-channel override settings.

Notes

Sits after Atlas Layout and before Atlas 3D, Atlas Emboss, and Atlas Trace.
The alpha channel has additional chromakey and connectivity-based sub-modes for extracting alpha from atlases that do not already carry one.
The height channel feeds the optional Atlas Emboss step downstream.

See also: Atlas Workflow · Materials: Atlas (shading the derived channels) · Atlas Trace

Atlas Layout

Identifies the individual cards in an atlas image, lays them out, and prepares per-card straightening and deformation controls for downstream processing.

Atlas Mesh

Atlas pipeline auxiliary. Mesh construction, subdivision, part merging, and per-region shaping (border, spine, vein) for atlas cards.