With the file extension SHH setting files for depth and light effects (Shadow / Highlight) of the image editing software Adobe Photoshop are marked. In SHH files, values for Strength and the radius of a shadow or highlight are stored. In addition, adjustment values for, for example, color corrections and mid-tone contrast are stored therein.
The window for shadows / highlights can be found under 'Image-> Adjustments-> Depths / Lights'. SHH files can be loaded and saved here.