Enable gain map exports from Photoshop

[gregbenz]

Gain map support in LR / ACR is great, and it would be helpful to extend it to Photoshop as well.

[gregbenz]

JPG and AVIF would be particuarly helpful. JXL would be nice to have.

[afen261243440837ddb]

Exporting AVIF and JPEG XL with gain map is currently an experimental feature (not fully tested or tuned).  Therefore, it is not enabled by default.  However, you may access this feature by holding the Shift key while clicking on the Save button in Camera Raw.  (Be sure to press Shift before clicking the Save button.)  Then the Save dialog will have a new checkbox in the Color Space section called "Embed HDR Gain Map."  

[gregbenz]

FYI that my Web Sharp Pro plugin now includes the ability to export JPG gain maps from Photoshop. https://gregbenzphotography.com/web-sharp-pro-panel