Rick Gordon wrote:
>The overlay modes (Overlay, Soft Light, Hard Light, Vivid Light, and Linear Light) are the various blending modes in which the following occurs:
>
>1) A value lighter than 50% gray blended into the source layer or channel will cause lightening to occur
>
>2) A value darker the 50% gray blended into the source layer or channel will cause darkening to occur.
>
>3) A 50% gray will exhibit no change.
If you are saying that the imprecision inherent in rounding up the numbers would show as a visible difference in lightness, I doubt that, mainly because the imprecision is so small that the effect would likely not be readily visible, or would not make a difference in practical terms.
Also, since there is no way either to input or view decimal values in 8 bits in Photoshop, how would you exactly know whether the rounded-up number is 50.2 or 49.8?
Marco Ugolini
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