I discovered today that the HDR + WCG Image Viewer on the Microsoft Store allows you to create heatmaps of existing HDR screenshots. This is especially of interest for titles where Special K can’t render anything in and the game bar (WinKey+G) needs to be relied on to take a screenshot.
The only downside seems to be that while the app has an “Export image to SDR” option, that option does not actually export the currently rendered image (e.g. the heatmap), but only the original HDR image.
This means that to take the below screenshots I had to basically open the source screenshot, configure the app to display them in the mode I wanted, and then hit
F to hide the UI and display the app in fullscreen mode and – you might’ve guessed it – use the game bar through WinKey+G to take a new screenshot of the app (aka image) in that mode.
A bit cumbersome.
- Note that some details in the clouds are lost in the HDR-to-SDR conversion… Compare with the heatmap to see what.
SDR as grayscale: