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Well, after seeing some of the posts I thought I'd give 3.5's radiosity a
stab. I started with Rick(Kitty)'s settings for his "Outdoing Brazil" post
and went from there. There's one, dim light source (rgb 0.06) in the scene
and a few items with high diffuse/ambient settings (diffuse 0.8 ambient
0.8). Render time was 6h 30m 52s at 640*480.
Global settings were:
global_settings {
adc_bailout 0.003922
ambient_light <1.0,1.0,1.0>
assumed_gamma 1.9
hf_gray_16 off
irid_wavelength <0.247059,0.176471,0.137255>
max_intersections 64
max_trace_level 20
number_of_waves 10
radiosity {
brightness 13.804
count 1100
distance_maximum 0.0
error_bound 0.0157
gray_threshold 0.2119
low_error_factor 0.0009
minimum_reuse 0.1875
nearest_count 3
recursion_limit 1
}
}
Any comments or advice, especially on help reducing the artifaacts, would be
appreciated.
Witherin
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Download 'rad_pyramid.jpg' (32 KB)
Preview of image 'rad_pyramid.jpg'
![rad_pyramid.jpg](/povray.binaries.images/attachment/%3C3bc723a9%40news.povray.org%3E/rad_pyramid.jpg?preview=1)
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Hey David,
Hi again!
> Any comments or advice, especially on help reducing the artifaacts, would be
> appreciated.
I think you need a lower pretrace_end, perhaps .01. Also, do you have
a ceil?
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org/
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Hi David,
It looks like you may have hit the sampling quirk which I reported on
p.b-t - it shows up most with low error_bound values because the
radiosity samples are sharp and not averaged across the surfaces.
Hopefully a fix will come out in a not-too-distant beta.
Bye for now,
Mike Andrews.
David Heys wrote:
>
> Well, after seeing some of the posts I thought I'd give 3.5's radiosity a
> stab. I started with Rick(Kitty)'s settings for his "Outdoing Brazil" post
> and went from there. There's one, dim light source (rgb 0.06) in the scene
> and a few items with high diffuse/ambient settings (diffuse 0.8 ambient
> 0.8). Render time was 6h 30m 52s at 640*480.
>
> Global settings were:
>
> global_settings {
> adc_bailout 0.003922
> ambient_light <1.0,1.0,1.0>
> assumed_gamma 1.9
> hf_gray_16 off
> irid_wavelength <0.247059,0.176471,0.137255>
> max_intersections 64
> max_trace_level 20
> number_of_waves 10
> radiosity {
> brightness 13.804
> count 1100
> distance_maximum 0.0
> error_bound 0.0157
> gray_threshold 0.2119
> low_error_factor 0.0009
> minimum_reuse 0.1875
> nearest_count 3
> recursion_limit 1
> }
> }
>
> Any comments or advice, especially on help reducing the artifaacts, would be
> appreciated.
>
> Witherin
>
> [Image]
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"David Heys" <sou### [at] gci net> wrote in message
news:3bc723a9@news.povray.org...
> Well, after seeing some of the posts I thought I'd give 3.5's radiosity a
> stab. I started with Rick(Kitty)'s settings for his "Outdoing Brazil" post
> and went from there. There's one, dim light source (rgb 0.06) in the scene
> and a few items with high diffuse/ambient settings (diffuse 0.8 ambient
> 0.8). Render time was 6h 30m 52s at 640*480.
...
> Any comments or advice, especially on help reducing the artifaacts, would be
> appreciated.
>
> Witherin
>
Don't know how to help you with the radiosity (I'm just starting out myself),
but I like the image somehow. The pyramid structure intrigues me. I'm not sure
what it's supposed to be (if anything) but I like it.
Michael
--
camera{location<8,20>look_at<6,0,4>}light_source{<8,8>rgb 1}difference{union{
#macro M(D,J)#local R=asc(substr(D,J,1))-32;<div(R,10)*2,mod(R,10)>#end#macro
E(D,B,R)prism{-D,4+D,R#local C=1;#while(C<R+1)M(B,C)#local C=C+1;#end}#end E(
0," (2:FPKAD80* U_dZU"18)sphere{2,2}#macro T(N)cylinder{<9,-N,3><9,4+N,3>3-N}
#end T(0)}T(2)E(1"45LNXUK4"8)pigment{rgb x+y/2}}//(c)2001 MDJohnson(Redbeard)
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