It took 1,5 h on Athlon 1,7 with photons spacing 0.05, probalby because 
computer run out of it's 256 RAM (some memory was used by other process) 
and it was swapping all the time do disc. 30 min took shooting photons.

I will try to render it again on ~1 Ghz with 1024 RAM, with spacing 0.02 
and this time - with radiosity

How we can see some photons artefacts are in middle-botom of image. Maybe 
just adding jitter instead of increasing spacing will help ?
If yes - maybe this image could be a nice example to manual about photons 
:) 

All comments are welcomed

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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"Rafal 'Raf256' Maj" <raf### [at] raf256com> wrote in
news:Xns### [at] 204213191226 

btw - where from this long rainbow line going accros bottom part of picture 
came from :) ? It could be either glass refraction, or metal ring around it 
reflection... or maybe both

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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"Rafal 'Raf256' Maj" <raf### [at] raf256com> wrote in
news:Xns### [at] 204213191226 


I added radiosity and "light sphere" - sphere made from about 
30 light_soures.

But now my dispersion don't affect photons - ther is no rainbow, only white 
photons - why ? All lights in "light sphere" doesn't effect photons - so I 
quest it must be radiosity "fault" ? how can I still have dispersion 
photons and use radiosity ?


Rays:          19747704   Saved:           2656851   Max Level: 47/100
47 ? wow I woundering why... I guest that some photons must go trought 
ring->glass->ring->glass->ring etc

Surface of Revolution         29359998         1861789      6.34
Surface of Rev. Bound         29359998         3333150     11.35
does it means I should i.e. make another boundeing boxfor my SOR (glass 
hand)

Peak memory used:          3431388 bytes
only 3 MB ? at spacing 2 times smaller it was IMO about 100 mb ;) 

Time For Photon:   0 hours  0 minutes   9.0 seconds (9 seconds)
Time For Trace:    2 hours 10 minutes  32.0 seconds (7832 seconds)
    Total Time:    2 hours 10 minutes  41.0 seconds (7841 seconds)

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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Attachments:
Download 'a4_v061.jpg' (30 KB)

Preview of image 'a4_v061.jpg'

"Rafal 'Raf256' Maj" <raf### [at] raf256com> wrote in message
news:Xns### [at] 204213191226...
[]

Nice pic, but I would like to see something through the lens?

> How we can see some photons artefacts are in middle-botom of image.
Maybe
> just adding jitter instead of increasing spacing will help ?

Someone posted a similar problem a little while ago, and it was
suggested the light source was too close. Moved further away and
problem solved.

Alf

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"Alf Peake" <alf### [at] peake42freeservecouk> wrote in 
news:3d3c202c@news.povray.org

> Nice pic, but I would like to see something through the lens?

yes - it's my problem with it - can it be a bug ? 
pigment is color rgbf <.93,.95,.99,.98>
and if ther is nodispersion - it looks like glass
after adding dispersion - glass is very 'dark' and non-transparent. After 
adding dispersion I had to add ambinet 2.5 (!) to have sam brightness as 
with no dispersion and ambient 0.0

>> How we can see some photons artefacts are in middle-botom of image.
>> Maybe just adding jitter instead of increasing spacing will help ?
> Someone posted a similar problem a little while ago, and it was
> suggested the light source was too close. Moved further away and
> problem solved.

not in this case - light is in <-20,45,-30>*100
while scene (magnifying glass) is about 40x40x40


-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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"Rafal 'Raf256' Maj" <raf### [at] raf256com> wrote in
news:Xns### [at] 204213191226 

Yeep, I'm alsow tired with this magnifying glass :/ but I will not give up 
until I get nice image :) even if each render time is 5-10 h ;(

This image shows possible bug - texture looks very diffrent on mosaic 
preview 2x2, and on final 1x1 image.

The 2x2 glass is more 'clear' and 'sharp' and 1x1 is very blured/non-
transparent, while the effect, if any, should be reversed.



-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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Attachments:
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Preview of image 'a4_pre.jpg'

yes - it's my problem with it - can it be a bug ?
> pigment is color rgbf <.93,.95,.99,.98>
> and if ther is nodispersion - it looks like glass
> after adding dispersion - glass is very 'dark' and non-transparent. After
> adding dispersion I had to add ambinet 2.5 (!) to have sam brightness as
> with no dispersion and ambient 0.0

Perhaps you have to play around with "collect off" for the
glass, double_illuminate and transmittance instead of filtering...

Just a guess though...

Tim

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