Ah, I’d not checked the Xbox capture (I just used the nVidia Share stuff to Alt-F1 grab the entire screen for native res captures but only does SDR without the Ansel special hooks in the game - sometimes I’m just capturing video so can scrub through the footage to grab a few in-progress shots).
Good to hear they’re doing HDR grabs - Jpeg XR is a MS tech so I guess that’s why they’re doing that over OpenEXR (an ILM open format). I might have to do some poking to try and work out how to import that into my preferred image processing workflow (old Adobe Lightroom). The issue with editing SDR shots after the fact is they’re quantised to 8-bits (along that classic gamma curve) so any additional processing leads to banding/information loss (which is a huge shame when the game is internally processing an HDR image with >8-bit info and often working with a linear space before the tone-mapping to the screen).
Edit: Hmm, and the MS Photoshop plugin is just that (so no support for Lightroom from a similar era). *Me opening a JXR in Microsoft Windows 10 Photos and trying to edit it*: How can you hate this image this much? (this is clearly not handling the 16-bit HDR info correctly)
One weird thing: the Xbox capture grabs 4K screenshots for me. That’s kinda expected as I’ve got a 4K screen but internally the game is rendered at 3200x1800 (because my 1070 isn’t quite up to 4K60). The nVidia Share captures 1800p native shots, not the 4K upscaled output. Presumably they hook into different buffers to extract the screenshots.