If I upload 3 files of the same picture with different exposures, will it create an HDR image from these 3 pictures?
Yes. AutoHDR uses a vision-based grouping algorithm to detect multiple exposures of the same angle, groups them together, then uses AI to edit them like a human would.
How it works
Upload your 3 exposures (along with any other photos). The AI identifies that they're the same angle, groups them as a bracket set, and produces an HDR-style edit from the blend.