https://gregbenzphotography.com/hdr-photos/hdr-gain-maps-vs-tone-mapping/
HDR: gain maps vs tone mapping - Greg Benz Photography
hdr gain mapstone mappingvs
https://forum.affinity.serif.com/index.php?/topic/227856-please-add-support-for-hdr-gain-maps-at-least-jpg/
Please add support for HDR gain maps (at least JPG) - Feedback for the Affinity V2 Suite of...
Affinity has some great tools for editing HDR, but lacks critical support to import or share the work. It cannot import or export HDR gain maps in JPG, HEIC,...
please add supporthdr gainjpg