Material ID maps are textures that contain RGB information based upon either separate mesh parts, exported/embedded material data or Low Poly UV shells and are generated via Knald's baker. They are extremely useful for texturing purposes; allowing the user to create selection masks based upon different materials on a mesh.

It is possible to assign a maximum of 255 unique colour values within a Material ID map, either allowing Knald to generate them automatically for you as the number of mesh part or UV shells increases or by using the color pickers found next to each High Poly mesh within the Bake Meshes group.

They can be generated via from either of the following sources:

• (*.obj) - Wavefront OBJ (modified).
• (*.fbx) - Autodesk FBX.

Concavity¹⁾

Image Space & Baker Concavity Settings

Source: The method of generating the Material ID map.

• Mesh ID: Assigns one unique color per High Poly mesh.
• Material: Assigns colors based on exported or embedded material data.
• UV Shells: Assigns one unique color per Low Poly UV shell.

Concavity Map