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It seems a ray traced (from the camera) through the media (entering and then
exiting) is treated differently than one that hits the diffuse surface
directly when considering "radiosity" at a diffuse surface. I tried to
debug this
myself but am having trouble tracking it down. Is this a known bug, or Is
there a setting in the scene that could fix this???
* The attached image is rendered using my version of POV-Ray v3.6, where the
bounds of the media box container is visualized.
Below is the scene file:
#include "colors.inc"
global_settings
{
assumed_gamma 1.0
max_trace_level 5
noise_generator 3
#if(1)
radiosity
{
media on // need this for interaction with media
//pretrace_start 0.04
//pretrace_end 0.01
count 32
recursion_limit 3
nearest_count 10
error_bound 0.5
//normal on
}
#end
}
background { color White }
//----------------------------------------------
// CAMERA
//----------------------------------------------
camera {
location <2, 4, 12>
look_at <0,1, 0>
up <0,1,0>
angle 60
}
//----------------------------------------------
// Media
//----------------------------------------------
box {
<0,0,0>, <1,1,1>
texture {
pigment {color rgbf 1}
}
interior {
media {
scattering { 1, rgb 0.2}
intervals 1
samples 20
method 3
}
}
hollow
scale <6,6,6>
translate <-2,.3,0>
}
//----------------------------------------------
// GROUND
//----------------------------------------------
object {
isosurface {
function {y}
contained_by {box {<-100,-3,-100>, < 100, 1, 100>}}
texture {
finish {
ambient 0.0
diffuse 1.0
specular 0.0
}
pigment { color rgb <1,1,1> }
}
}
hollow
}
//----------------------------------------------
// WALL
//----------------------------------------------
box { <-2.0, -0.2, -2.0>, <2.0, 0.2, 2.0>
finish {
ambient 0.2
diffuse 0.9
}
pigment { color rgb <1,1,1> }
scale 5
rotate <0, 0, -90>
translate <-4,5,0>
}
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Attachments:
Download 'irradiance_test2.jpg' (15 KB)
Preview of image 'irradiance_test2.jpg'
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