Playing with radiosity again.

global_settings {
assumed_gamma .92
radiosity {

pretrace_start .00024
pretrace_end .000284
count 40
nearest_count 7
error_bound 0.25
recursion_limit 1.81
low_error_factor 0.65
gray_threshold 1
minimum_reuse 0.015
brightness 2
//ambient 1
adc_bailout 0.01/2
}}

sky_sphere {
pigment {
gradient y
color_map {
[0.75 color rgb 0]
[0.9 color rgb 3]
}
scale 2
translate -1
}
rotate 45*x
}