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Sorry for the mistakes, this one should work fine.
> Hi, I'm also trying to find out how photons are working.
> The first thing i noticed, photons without radiosity are senseless. Somehow
> they look unrealistic and they are not bright enough. But maybe thats a
> reason of my scene.
> If You want to have more brighter photons You can do the following :
>
> Multipy the color-statement in You lightsource by 2 or 3 and render the
> image with save photons turned on. Then change back the light intensity to
> normal, render again with photons, but load the photon map this time. Your
> scene will be illuminate like normal, but much brighter photons will
> appear.
> The image in
> http://news.povray.org/web.415ab576364ff56a6b3522e90%40news.povray.org was
> created like that.
>
> To make it more easy I'm using some little macros to switch between some
> radiosity and photon setting.
>
> #declare Radiosity = off; // on/off
> #if (Radiosity)
> Radiosity_Brightness (2, 1, on, on, 1 )
> #end
> #declare Photons = off; // on/off
> #declare P_Preview = off;
> #if (Photons)
> Photons_Quality ( 0.01, 1, 5, 1)
> #end
>
>
> //#macro Radiosity_Brightness ( type, brightness, normal, media, File )
> //
> // Type : [0] = Radiosity_Default
> // [1] = Radiosity_Debug
> // [2] = Radiosity_Fast
> // [3] = Radiosity_Normal
> // [4] = Radiosity_2Bounce
> // [5] = Radiosity_Final
> // [6] = Radiosity_OutdoorLQ
> // [7] = Radiosity_OutdoorHQ
> // [8] = Radiosity_OutdoorLight
> // [9] = Radiosity_IndoorLQ
> // [10] = Radiosity_IndoorHQ
> //
> // Brightness : [value] is multiplied with brightness=1
> //
> // normal : [on/off] Radiosity with normal
> //
> // media : [on/off] Radiosity with media
> //
> // File : [0] = do no file operation
> // [1] = saves a specified radiosity.txt
> // [2] = loads a specified radiosity.txt
> //
> #macro Radiosity_Brightness (Rt, Rb, Normal, Media, RFile)
> #include "rad_def.inc"
> global_settings
> { assumed_gamma 2.2
> ambient_light color rgb <1.0,1.0,1.0>
> max_trace_level 4
> radiosity { Rad_Settings(Rt, Normal,Media)
> brightness 1*Rb
> normal Normal
> media Media
> #switch (RFile)
> #case (0)
> #break
> #case (1)
> save_file "File"
> #break
> #case (2)
> load_file "File"
> #break
> #end } }
> #end
>
>
>
>
>
> //#macro Photons_Quality (Spacing, Jitter, max_trace_level, File)
> //
> // Spacing : same as spacing [0.01..0.05]
> //
> // Jitter : same as jitter [0..1]
> //
> // max_tr_lev : max_trace_level
> //
> // File : [0] = do no file operation
> // [1] = saves a specified photons.txt
> // [2] = loads a specified photons.txt
> //
> #macro Photons_Quality (Sp, Ji, mtl, PFile)
> global_settings { assumed_gamma 2.2
> photons {
> spacing Sp
> gather 35, 250
> media 35, 250
> jitter Ji
> max_trace_level mtl
> adc_bailout 0.01
> //autostop 0
> //radius 10
> // (---Adaptive Search Radius---)
> //steps 1
> //expand_thresholds 0.2, 40
> #switch (PFile)
> #case (0)
> #break
> #case (1)
> save_file "File"
> #break
> #case (2)
> load_file "File"
> #break
> #end}}
> #end
>
>
>
>
> Shu.
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