The PFM plugin is a Bitmap I/O plugin that will allow you to natively load/save PFM files directly in 3ds Max as you can with other bitmaps. The PFM format (Portable Float Map) is a high-dynamic range (HDR) format. This format is necessary to compile HDR textures into the Source Engine. It is also used with other applications.

The zip file includes extra information on this plugin.

This product is also included in  Wall Worm Pro Pack. If you use Wall Worm, you should update WW itself and not use this standalone version.

Available in 3ds Max 2015-2020.