I suggest use diffuse 1 brilliance 0 to get the binary lighting effect. This 
should provide a perfect on/off light without using extreme brightness 
values.

Alternatively to clamp colours before anti-aliasing I use Megapov 1.21 with 
global_settings { tone_mapping { function { min(1,x) } } }

-- 
Tek
http://evilsuperbrain.com


news:465daf16$1@news.povray.org...
> Hello!
>
> For some piece of mathematical visualisation I need a "binary" reflection 
> model: One color for the unlit parts of the object, and one for the lit 
> parts. This can be achieved fairly easy by specifying an insanely high 
> diffuse value (100 in my case).
> It works alright, but there is a weird problem: Obviously the high diffuse 
> value somehow disturbs antialising. The edges of the lit areas are not 
> antialiased at all, not even when using AA-Threshold 0.0. How can that be 
> possible? According to the POV for Windows help file antialising of a 
> pixel is performed when the contrast between it and its neighbor pixels is 
> high enogh (broadly speaking). This is the case between the lit area and 
> the shadow area. So why are these lines jagged? With a lower diffuse value 
> the problem dissappears.
>
> Does anybody have an idea why this problem exists? And if there is a way 
> to solve it?
>
> Greetings,
>   Florian
>

Post a reply to this message