color mode change calls up HDR toning field

Question

In the latest Photoshop update, when you click image/mode and want to change from 32 bits to 16 bits, the HDR toning popup appears and the color balance in the image changes drastically.

Normally, the popup should not appear and the color balance should stay the same.

Please fix this.

davescm · Accepted Answer

Tone mapping has always come up when changing from 32 bit linear to a 16 bit gamma colour space. That is not new. It has to as the 32 bit floating point linear file can contain values that are out of the range of the 8/16 bit integer file. Tone mapping controls how those values will be treated.

To get the same view as you see on screen, use Exposure & Gamma as the method and leave Exposure at 0 and Gamma at 1.00.

In addition, if your file is multi-layered, flatten it first before converting to avoid colour changes caused by blending. That applies to any colour space conversion.

Dave

D Fosse · Answer

There has to be tone mapping when going from 32 bits to 16 bits, that’s the whole point. A 32 bit file can contain a much wider range of tones than 0-255, in other words, 16 bit data can only hold a narrow window into the full data.

So you need to choose where that window is.

If you have something else in mind, please show screenshots.

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