Negate Portable Float Map filter

Download and install the latest version of Filestar.
Right click on one or more Pfm file(s) on your desktop and select Convert with Filestar.
Type negate filter in the search box.
Press Run.

What is .pfm?

Name: Portable Float Map
Extension: .pfm
Format: Binary
Category: Raster Image
Developer: Paul Debevec
Description: Portable Float Map, an uncompressed high-dynamic-range raster image format that stores each pixel as 32-bit floating-point values, in colour (PF) or greyscale (Pf).
MIME Type: image/x-portable-floatmap

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