I'm late to the party but I recently found out about the Focos App (iOS, Android) that appears to use computational photography techinques to be able to adjust the focal point on pretty much any image, no extra depth data needed, it somehow computes the depth from the image itself.
This allows all kinds of interesting affects. As a simple example imagine Lightroom could generate a mask from depth info, then it would be easy to apply effects only to things within a certain range of depth.
I'm actually somewhat surprised this type of feature isn't already in Lightroom Classic (or Photoshop). Adobe introduced content aware fill which is also a kind of high computation effect.
Given the app generates depth info they allow you to place lights in 3D in existing photos
And even visualize the scene in 3D to help position lights
Maybe this feature already exists but my search-fu hasn't brought it up. All I see is tutorials on manually drawing depth maps and as for lights I only see putting effectively 2D ovals in "lighten mode" but nothing approaching the features above.
I hope Adobe will considered adding such a feature to both Lightroom Classic and Photoshop. The seem right up Adobe's alley. In Lightroom just the ability to computationally change the focus depth would be amazing. In Photoshop the ability to generate a depth mask from the photo would also seem to be extremely useful.
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