▫️Descriptions

About

A significant portion of assets for Cyberpunk 2077 leverage the complex multilayered.mt supershader. The supershader has several different component files which are used to create masks to blend procedural textures without baking them. You can read more about this technique in this documentation by CDPR Technical Art Director Krzysztof Krzyścin: https://magazine.substance3d.com/cyberpunk-2077-a-world-full-of-substance/​

While the multilayered supershader is very common, there are hundreds of other non Substance-style shaders, some with traditional baked PBR textures.

Composition

The multilayered shader is composed of three distinct parts:

1. Layer Masks | Mask textures that control where each surface is visible .mlmask files​

2. Layer Definitions | Controls procedural effects such as tiling or color for each layer .mlsetup files​

3. Layer Surfaces | Links PBR textures to create numerous pre-defined visual surfaces .mltemplate files​

What is the mlmask?

MLMASK files are the core element of the substance-style integration. These files contain an array of up to 20 textures which are used to control the blending between pre-defined surfaces called mltemplates. These mask textures are more-or-less 1:1 with substance-style layer masks.

Demonstration of how mlmask files are used to mask meshes. Each mask represents a separate surface.

As shown above, each mesh using the multilayer shader uses a unique mlmask file that is hand authored by CDPR artists. To take effect in game, each mask file is linked by the mlsetup file.

What is the mlsetup?

MLSETUP files are fairly self-explanatory when considering the name, multilayer setup. These files correspond with an mlmask file and are responsible for setting up parameters for each layer from the mlmask. Each layer within an mlsetup contains information very similar to materials or shaders.

File structure of mlsetup viewed with WolvenKit

MLSETUP Definition

Property	Description
colorScale	Sets a color from within the mltemplate file
material	Path to mltemplate file
matTile	Tiling multiplier for the main surface texture
mbTile	Tiling multiplier for the microblend texture
metalLevelsIn	?
metalLevelsOut	Clamps metalness output levels
microblend	Procedural detail texture
microblendContrast	Controls influence of microblend texture
microblendNormalStrength	Multiplier for adjusting normalblend strength
microblendOffsetU	Shifts UV map for microblend texture
microblendOffsetV	Shifts UV map for microblend texture
normalStrength	Sets intensity of mltemplate normal map
offsetU	Moves UV in X direction
offsetV	Moves UV in Y direction
opacity	Sets layer opacity
overrides	?
roughLevelsIn	?
roughLevelsOut	Clamps roughness output levels

What is the mltemplate?

MLTEMPLATE files are the actual visible surfaces that appear on meshes using the multilayered.mt supershader. The multilayer templates include a wide variety of surfaces such as steel, iron, aluminum, plastic, nylon, linoleum, carpet, soil, grass, rubber, concreate, and everything else imaginable. Each template can use a unique color, normal, roughness, and metallic PBR texture. The mltemplate files are selected from within each layer definition of an mlsetup file. Meshes can blend up to 20 mltemplate surfaces into a single material by masking them with the mlmask.

File structure of mltemplate viewed with WolvenKit

A sample preview of some materials created by mltemplate files

Technical Details

Multilayered Shaders
engine\materials\multilayered.mt
base\materials\multilayered_clear_coat.mt | Adds clearcoat effect
base\materials\vehicle_destr_blendshape.mt | Adds procedural vehicle damage
base\materials\cloth_mov_multilayered.mt
base\materials\multilayered_terrain.mt
base\materials\ver_mov_multilayered.mt

multilayered

Texture Channels	Red	Green	Blue	Alpha
GlobalNormal	Normal R	Normal G	?	?
MaskAtlas	?	?	?	?

Name	Description
MultilayerMask	See mlmask
MultilayerSetup	See mlsetup
GlobalNormalIntensity	Sets visual intensity of normal map texture
GlobalNormalUVScale	?
GlobalNormalUVBias	?
MaskAtlas	?
MaskTiles	?
Layers	?
LayersStartIndex	?
SurfaceTexAspectRatio	Sets number of mlmask layers to be used
MaskToTileScale	?
MaskTileSize	?
MaskAtlasDims	?
MaskBaseResolution	?
SetupLayerMask	?
NormalsTextureDDXYMultiplier	?
MicroblendsTextureDDXYMultiplier	?

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