About the Substance Importer

Substance Files

There are two types of substance files:

• .sbs files let you author an Adobe substance.

  A .sbs file contains all the parameters of an Adobe substance.

  To modify an Adobe substance, you can edit the corresponding .sbs file.

• .sbsar files let you publish an Adobe substance.

  A .sbsar file contains all the parameters of an Adobe substance.

  It contains the required data to produce 2D textures with an Adobe substance engine.

Substance Output Size

You can choose the base resolution of images in the substance graph.

To do so, click next to the dialog box name then select the appropriate size from the list.

Material Setup Information

You can choose the following information about the material to create:

• Its name
• Its type (core or covering)

Important: This area is only available when you click Create an Appearance data from a Substance archive .

Appearance Setup Information

You can choose a material appearance type in the list.

When you select Compatibility Parameters , you can define the compatibility between material appearance parameters and a substance.

Substance

You can select an Adobe substance in three ways:

• Using the file chooser.
• Entering the appropriate path.
• Using the previous path that is automatically entered in the text area.

Substance Graphs

A substance graph generates textures and is used to build Adobe substances.

The author of the substance can choose the graph parameters to expose.

A substance graph is identified by:

• Its package URL
• A label that you can specify.

When you select a graph, the preview area automatically updates.

Substance Graph Outputs

A substance graph output is the computation result of the procedure that is described by a substance graph parameter. This computation results in a set of tillable 2D textures.

Substance graphs can output single values instead of images. This avoids creating full-size images, which reduces memory usage because fewer full-size textures are produced.

Value outputs are interpreted as the color used to fill the texture. For example, the output texture for a uniform base color can be represented as a float3 RGB color, or as a float4 RGBA color.

Substance Output - RGB/RGBA Color

The available types for these value outputs are as follows:

• float1, float2, float3, float4 (vector of floats)
• integer1, integer2, integer3, integer4 (vector of integers).

Value Output - Float Example

Value outputs are interpreted as 1x1 pixel textures that are attached on channels like standard substance textures. The image format depends on the type of the substance output.