Try this scene also with variance 0. Also try ambient 100
to see how colors are clipped before dof calculations.
global_settings{assumed_gamma 1.0}
camera{
location <0,0,-10>
direction 2*z
up y right x
look_at<0,0,0>
aperture 2
blur_samples 100
focal_point <0,0,-2>
confidence 0.99
variance 1/10000
}
sphere{0,1 pigment{rgb 1} finish{ambient 1}}
_____________
Kari Kivisalo
