WEIRD Contrast behaviour in PS CS !!

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  02 February 2005
WEIRD Contrast behaviour in PS CS !!

I recently started using Photoshop CS and have some strange behaviour with Brightness/Contrast (B/C).

Simply take a white image (RGB,8 bit) and move the contrast slider to -50. In PS7 and AfterFX this darkens the image. In PS CS it does nothing.
Now when I add some black stripes to the white image, and again move the contrast slider to -50, the image DOES darken in CS.
I could understand it as being a changed feature, but since its behaviour is different from AfterFX6.5 I really wonder what is going on.
Or is it my machine ???
  02 February 2005
Can't say really why that happens with the bg layer. But if you use an Adjustment Layer to do this you'll find it works just fine.

Just another fine photoshop mystery i guess.
  02 February 2005
That's very strange indeed. I would say the CS version is the real one though because changinf the contrast on a totally white image shouldn't affect it since it is a unified color (no areas impede on other ones in terms of brightness)
maya@reddit r/maya
  02 February 2005
Quote: changing the contrast on a totally white image shouldn't affect it since it is a unified color
I agree completely with that. But when i tested this one for myself i did notice that if you add a new layer, but put nothing on it, and drop the contrast on that empty layer, it DOES effect the white bg. That doesn't really make much sense to me. Yet there it is.

  02 February 2006
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