alphaQuad nous illumina en ce 2008-08-22 12:36 -->
> Warp <war### [at] tagpovrayorg> wrote:
>> alphaQuad wrote:
>>> no pic, waiting for a better one @ adaptive 0 but looks like adaptive 50
>>   adaptive 50 would only make a difference if your area light has more
>> than 1125899906842625 x 1125899906842625 points in it. We can assume it
>> doesn't.
>>
>>   Adaptive 0 makes a difference if your area light has more then 2x2
>> points in it. For adaptive 1 it has to have more than 3x3 points, for
>> adaptive 2 it has to have more than 5x5 points, for adaptive 3 it has to
>> have more than 9x9 points, for adaptive 4 it has to have more than 17x17
>> points. In general, "adaptive n" will make a difference only if your
>> area light has more than (2^n+1) x (2^n+1) points. For adaptive 50
>> that's 1125899906842625 x 1125899906842625.
>>
>>   If your adaptive value is too large, POV-Ray will simply ignore it and
>> use the area light without any adaptive supersampling.
> 
> ya that makes sense, I have to read stuff 2-3 times before it sinks in.
> 
> Between king and queen shadows could not fixed at adaptive 0, gave up and bumped
> to 1. Still quick by my standard.
> 
> New white wood brightens scene
> Area light diameter from 15 to 12
> Probably a bad choice = lost captured piece light,
> complicated by table finish changes.
> 
> fixed phong haze/burnout that was in previous image.
> 
> I can show a statement in the help file somewhat inaccurate:
> (Or that I have no memory)
> "Area light only affects shadows" (from memory)
> 
> area_light diameter greater than light distance is like setting phong intensity
> lower as it's diameter goes up..
> less than light distance seems to have little change.
> 
> 
> ------------------------------------------------------------------------
> 
Unless you use version 3.7 with area illumination on, phong and specular are 
rendered as if the area_light was a point_light.
But, if you also use photons with area_light in the photons block, the photons 
calculations will take the area_light into account.
When you have somewhat complex transparent objects, with an ior and reflections, 
what you see as an highlight may not be one but a reflection of a bright spot. 
The bright spot on the top of the rock is realy a reflection of the caustic at 
it's base.

-- 
Alain
-------------------------------------------------
I can read your mind, and you should be ashamed of yourself.

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