POV-Ray : Newsgroups : povray.documentation.inbuilt : Some mistake in reference 3.4.4.1.2 spotlight section : Re: Some mistake in reference 3.4.4.1.2 spotlight section Server Time
18 Jan 2022 18:54:59 EST (-0500)
  Re: Some mistake in reference 3.4.4.1.2 spotlight section  
From: clipka
Date: 19 Nov 2013 09:02:22
Message: <528b6f6e@news.povray.org>
Am 19.11.2013 13:52, schrieb James Holsenback:

>> 2. The description for the forth diagram in this section "To give the
>> tightness
>> value full control over the spotlight's appearance use radius 0
>> falloff 90. As
>> you can see from the figure below." should be correct.
>> ^^^^^^^^^^^^^^^^^^^
>> I think that is radius 90 falloff 90 for the diagram.
>
> i played around with this (quickly) and it doesn't seem to make a
> difference if it's 0 or 90

It does as soon as tightness comes into play.


There /is/ something fishy about that diagram and the paragraph before 
it. The diagram says something about "negative radius", and indeed 
doesn't match a radius of 0.

I think in the long run the section should be overhauled, and give 
sample renders instead of (or at least in addition to) diagrams.


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