Out of curiosity, I made a scene to show the array of elementary lights 
in an area_light and found something that I find surprising:
The outermost elements seem to be about half as bright as the rest, and 
the corner ones dimer still at maybe 1 fourth intensity.

I'm wondering if it's intentional or some oversight.

Here my test scene:
#version 3.7;
global_settings {
   assumed_gamma 1
}

plane{-z, -10 pigment{ rgb 1}finish{brilliance 0} }
//brilliance 0 so that the angle of incidence of
//the light have no effect.

disc{0,z,10000,0.03}
#declare W=11;
#declare N=17;
camera{orthographic location 1*z look_at z up W/2+1.2 right W/2+1.2}
light_source{-10*z rgb<1,0,1>*pow(N,2) area_light W*x W*y N N circular }

light_source{-10*z rgb<0,1,0>*pow(N,2) area_light W*x W*y N N }

Alain

Post a reply to this message