.HDT File Extension
File TypePhotoshop HDR Toning Preset File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an HDT file?
Settings file created by Photoshop professional CS5 or later image editing software; saves settings for adjusting an HDR (High Dynamic Range) photo; includes color, tone, and other settings.
Several HDR Toning presets are included with the Photoshop installation and are stored in the Presets/HDR Toning/ directory. You can also create custom presets and save them through the HDR Toning window.