The optional plug-ins for Alias, SGIRGB, SoftImage, HSB & HSL, Electric Image, and Wavefront RLA are not installed by default, but are available via download below.
See Photoshop - Supported versions for complete details.
Optional plug-ins can be installed to one of two locations:
- Version-specific location - which will only load the installed plug-in for a specific version of Photoshop (e.g. only Photoshop 2020)
- Shared Creative Cloud location - which will load the plug-in for all installed versions of Photoshop without having to reinstall the plug-in
For instructions on locating these folders on macOS and Windows, see Locate plug-in folders.
The Alias file format plug-in allows you to read and write files in the Alias .pix format. This format is commonly used for 3D rendering software from Alias/Wavefront, and in some image-editing software on UNIX systems.
The ElectricImage Multiplugin format plug-in allows you to read and write files in the ElectricImage picture format. ElectricImage 3D rendering software uses this format.
The HSL&HSB plug-in allows conversion from RGB > HSL (Hue, Saturation, and Lightness) and back, and from RGB > HSB (Hue, Saturation, and Brightness) and back within Photoshop. This plug-in allows you to make changes to the Hue, Saturation, or Luminosity of an image as independent channels, or make changes in HSL/HSB using channel operations (calculations).
The SGIRGB format plug-in allows you to read and write files in the SGI image format. This format is commonly used by software on the Silicon Graphics platform. The SGI image format plug-in recognizes the file extensions .sgi, .rgb, .rgba, and .bw.
The SoftImage format plug-in allows you to read and write files in the SoftImage picture format. This format is commonly used by 3D rendering software from SoftImage.