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Hi all,
I did some experiments using radiosity and no regular light sources to
see what can be done with pure ambient light. I then defined a light
source as a set of 10 concentric discs with fading and quite high
ambient value and try to place them in the scene like any regular light.
The result is attached with this message. The first and second row are
composed of one blue "light source" at different position and the last
row is composed of one white "light source" at different positions + a
blue sky dome.
I imagine this is nothing new but I like the atmosphere it gives.
Nicolas
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Attachments:
Download 'theeggexperiment.jpg' (44 KB)
Preview of image 'theeggexperiment.jpg'
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rou### [at] loria fr news:3EF### [at] loriafr
> The result is attached with this message. The first and second row are
> composed of one blue "light source" at different position and the last
> row is composed of one white "light source" at different positions + a
> blue sky dome.
Nice effects IMHO, you probably find usefull HDRI patch to make simmilar
scenes :)
--
#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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Thanks for sharing that with us. I made similar tries this week-end,
with less fortune though. I guess I messed up a bit with all the
parameters because I get strange patches of shadow (which gives a nice
artistic sight) and I see with your experiment that soft light is also
possible. Would you share the source ?
JC
Nicolas Rougier wrote:
>
> Hi all,
>
> I did some experiments using radiosity and no regular light sources to
> see what can be done with pure ambient light. I then defined a light
> source as a set of 10 concentric discs with fading and quite high
> ambient value and try to place them in the scene like any regular light.
>
> The result is attached with this message. The first and second row are
> composed of one blue "light source" at different position and the last
> row is composed of one white "light source" at different positions + a
> blue sky dome.
>
> I imagine this is nothing new but I like the atmosphere it gives.
>
>
>
> Nicolas
>
>
>
> ------------------------------------------------------------------------
>
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Of course.
I posted the code of the new attached picture to p.t.s.f. (it's a WIP).
The radiosity parameters are quite high to try to avoid the strange
patches of shadow (the image took 1h20 to render on a PII-995Mhz).
Have fun.
Nicolas
JC (Exether) wrote:
> Thanks for sharing that with us. I made similar tries this week-end,
> with less fortune though. I guess I messed up a bit with all the
> parameters because I get strange patches of shadow (which gives a nice
> artistic sight) and I see with your experiment that soft light is also
> possible. Would you share the source ?
>
> JC
>
Post a reply to this message
Attachments:
Download 'crackled-egg.jpg' (20 KB)
Preview of image 'crackled-egg.jpg'
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