Under the Export tab, you can export customized maps of your Mix. This option lets you control exactly how your Mix is exported. Mixer supports multi-channel packing and several image options. By default, the export tab will be complete with default settings for a standard export.
Maps can be exported to several file formats, and each format supports a different set of channels and bit depth.
The bit depth controls the range of values that can be used. For example, 8-bit color depth supports 256 colors, which is often enough for most applications. However, Mixer supports up to 32-bit depth, which supports over 16 million colors. Using a higher bit depth will result in maps with a greater size on disk.
Depending on how much information you want to export on a single map, you can choose between 1 (Greyscale), 3 (RGB), and 4 (RGBA) channels. Each channel can contain a different set of information.
File Format Comparison
Mixer exports support both linear and sRGB (gamma) space values. Linear space values will be mathematically accurate, and are used by default for the normal map and other greyscale values like gloss and displacement. On the other hand, sRGB values will be ‘corrected’ for visual accuracy, and are used by default for the albedo/diffuse and specular maps. What you choose will depend on the what the maps will be later used in, and how that engine/renderer/DCC deals with linear and sRGB color spaces. In general, unless you require linear maps, sRGB maps are the more common option for most tools.
Each channel can be filled with a certain set of information about the Mix:
- Value: Enter a constant value to fill the channel with.
- Diffuse/Albedo (R/G/B): The red, green, or blue color values of the surface.
- Specular (R/G/B): The red, green, or blue values of the specular reflections map.
- Gloss: The smoothness values of the surface.
- Roughness: The roughness values of the surface.
- Occlusion: The occlusion map values of the surface.
- Metalness: The metallic values of the surface.
Additionally, the Normal and Displacement maps have additional options when selected
- Normal (X/Y/Z): The X, Y, or Z values of the normal vectors of the surface.
- An Invert toggle inverts the normals.
- Displacement: The vertical displacement values of the surface.
- A Normalize toggle normalizes the displacement vectors.
- A Center toggle centers all displacement values.
- A 0-1 range input field specifies the range of your Mix’s displacement in centimeters.
- Surface Name: Specify the name of the Mix.
- Export Location: Specify the location where you want the Mix and its corresponding files to be exported.
- Create subfolder: Select to create a subfolder with the Mix’s name to hold the exported maps.
- Add resolution to file names: Select to append the resolution to the name of each file.
- Export Resolution: Specify the texture resolution at which you want to export your Mix.
- Export Format: Specify the file format for your maps (e.g. PNG, TGA, EXR, etc).
In this section, you get granular control over each map. You can adjust the map name, format and bit depth. Following are the adjustments you can make in this section:
- Add or remove a map.
- From the hamburger menu on the top right you can:
- Revert to default values.
- Save your export settings as a preset for later use.
After adding a new map, there are properties that can be customized based on your needs.
- 1: Name of the map file.
- 2: Toggle to show or hide settings.
- 3: Select file format. Each format has a different set of channels and bit depth available. For a comparison of the file formats available, see above comparison.
- 4: Number of channels to include in the map. Select between Greyscale (single channel), RGB (three channels), or RGBA (four channels).
- 5: Bit depth of map file. Select between 8, 16, and 32-bit.
- 6: Select data for a certain channel. Fore more information, see above Map Options.
- If Normal or Displacement is selected, additional toggles will appear.
- 7: Type of data to fil channel with (Linear or sRGB). For more information, see above Color Space.
Once you’re satisfied with your export options, click the Export [x] maps button to export your mix to the specified location.