32bit tiff render problem from Photoshop

Question

Hi,

I get "strange" looking pictures in Lightroom after having edited them in Photoshop, where I converted them to 32-bit. The contrast is much higher in Lightroom than in Photoshop. The file format of the pictures are .tif.

Program versions:

Lightroom Classic version: 9.2 [ 202001311240-2d026470 ]

Adobe Photoshop Version: 21.1.0 20200212.r.106 2020/02/12: 4dd027efb58 x64

BR

Robert

Todd Shaner · Accepted Answer

Please see Adobe Engineer Eric Chan's reply at the below link concerning this issue.

https://feedback.photoshop.com/photoshop_family/topics/lightroom_preview_of_hdr_tonemapped_image_doesnt_match_what_is_shown_in_photoshop_acr?topic-reply-list[settings][filter_by]=all&topic-reply-list[settings][reply_id]=13709665#reply_13709665

Tony_See · Answer

Yes its a very revealing post by Eric Chan, and I have taken the liberty to post a relevent snippet from it below for you:

"The reason is that if you keep the image as 32-bit, then Lr will think that it's not-yet-tonemapped (i.e., basically the same as a linear raw file) and will apply its own tone mapping by default, just like it does for raw files. This adds the (undesirable) punch and contrast that you're describing -- I say "undesirable" in this context because you've already tone mapped the image using the ACR controls."

Hope this helps you and others . . .

Note the age of his post though 😞

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