Photoshop: New layer dialog uses the wrong 50% gray as the neutral color for layer modes in 16-bit images.

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  • Updated 6 years ago
  • Acknowledged
  • (Edited)
I'm not sure if this issue applies to CS6, but in CS5 Photoshop uses the 8-bit 50% gray (RGB values of 128) when filling a layer that uses a neutral color of gray in 16-bit images (such as an 'overlay' or 'hard light' layer).

This actually lightens the image slightly -- 50% gray for 16-bit images is 16384, whereas Photoshop is currently using 16448. The neutral color should actually fall somewhere between the 8-bit RGB values of 127 and 128 but no such color can be picked using Photoshop's color picker.

I made a blog post of how to solve the problem if I'm being too unclear here: http://gapriest.blogspot.com/2012/08/...
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Geoff Priest

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  • frustrated but happy I found a temporary solution.

Posted 6 years ago

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Chris Cox

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Are you filling with the Fill command, or picking a color by hand?

The Fill command set to 50% should be using the full precision 16 bit value.
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Geoff Priest

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Geoff Priest less than a minute ago
I'm not using the Fill command -- I'm using the checkbox in the New Layer dialogue to fill the layer with the appropriate neutral color.
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Andrew Rodney

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Using Fill with 50% in CS6, on an 8-bit or 16-bit image provide identical results (identical Lab values).
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Geoff Priest

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Thanks Andrew, the fill command with 50% works but the checkbox to fill with a neutral color in the New Layer dialogue does not.
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Chris Cox

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Use the info palette, and look at the 16 bit values.

The Fill command in CS6 fills with 16384.
But CS5 used a converted 8 bit value by mistake and got 16448.
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Geoff Priest

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You're right, the fill command works. But using the New Layer dialogue to fill with the appropriate neutral color does not. Thanks for the quick reply.
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Chris Cox

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Ok, then we have a bug in the new layer dialog.
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Geoff Priest

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I'm not using the Fill command -- I'm using the checkbox in the New Layer dialogue to fill the layer with the appropriate neutral color.