Yes, the New Scale jumps from black to middle way too fast, all within the
first 10%.

As for the "compromise", I indeed have something up my sleve.  I'm still
experimenting, but I'm planning a "zone" system where each numbered zone is
"one stop" darker.  The float values that correspond to each zone will be
stored in a POV array, for use where ever you like.  I want to make the zone
numbers match what photograpers use in terms of which zones are supposed to
be shadow, which mid, which highlight, but for sake of discussion lets
suppose that #1 is darkest and #15 is brightest (keeping the same scale
direction as we are used to).  You can use White*Zone[2] to specify the
darkest shadow detail that still shows up against black.  Or something like
rgb <Zone[5], Zone[8], Zone[10]> to mix a color.  The zone numbers are in
your psycological space, where the difference in brightness between each
zone *looks* the same.  The float value in the array at that index is in
POV's flat gamma space, which is what the math of rendering likes.

Consider this a straw man.  Any comments, gang?

--John



Bob Hughes wrote in message <36EEBAC0.D52F531C@aol.com>...
>Fascinating.
>The "traditional" still looks more right to me though. The "new color
>scale" jumps from black to mid-gray it seems. I would think a
>combination of the two would be the best case scenario. traditional from
>0% up and new from 100% down with some sort of compromise in between.
>I'll just take "or bust" for now :) at least until I come up with the
>ability to make it look right for me.
>Oh, had you thought of using png example images instead of gif so gamma
>info could remain intact (if at all possible)?
>
>
>"John M. Dlugosz" wrote:
>>
>> I have had a bit more luck than others in this thread in using an
>> assumed_gamma=1.0 value.
>>
>> I've been examining the issues in some detail, and have started a page on
>> it.  It's at http://www.dlugosz.com/POV/Gamma/POVscene.html .

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