The PSD File node lets you use a PSD file as a texture network in Maya. It is similar to Maya’s File texture node, but it’s for PSD files only.
By default, Maya links a PSD file to the composite image, which is included in the PSD file. Maya can only read image and vector layers, so when the PSD node is linked to Adobe Photoshop’s composite image (it is by default), Maya supports anything that Adobe Photoshop supports, including (for example) layer styles, adjustment layers, text, and so on.
However, you can choose to link the PSD node to a layer set instead, in which case layer styles and adjustment layers are not supported and should be rasterized before the PSD file is read in Maya.
PSD files with layer sets facilitate iterative painting:
Maya treats all layers within a layer set as a single flattened image.
To use an existing PSD file in Maya
The PSD file is linked to Adobe Photoshop’s composite image.
See File Attributes.
To convert an existing Adobe Photoshop File Texture with layer sets to a Layered Texture