You can import shader networks from ASS or MaterialX files to Arnold Materials via the Utilities > Material > Import... menu or the Alt+W~I shortcut from the Material Manager.
You cannot import materials from MaterialX look files (see Export MaterialX Look).
Select the ASS or MaterialX file from the file browser. The plugin reads the shaders from the file and adds new Arnold Materials to the scene.
The type of the new material (Arnold Node Material vs legacy Arnold Material) depends on the default material system set in the Preferences.
- Shaders exported from other DCCs may not be tagged as surface and displacement shaders. In this case, the displacement shaders are imported as surface shaders to a new material and they have to be manually moved and connected to the displacement port of the right material.
Shaders can be imported to existing Arnold Materials from the Arnold Shader Network Editor.