global illumination (article)

[willvarfar]

http://www.iquilezles.org/www/articles/simplepathtracing/simplepathtracing.htm

[eiffie]

Thanks for posting. I hadn't checked to see what IQ was up to for a while and now I have a lesson from the master!

I put the code in the article together and made a Fragmentarium script out of it. (see attached)
I tried to keep it as simple as possible so others can add to it.

[Kali]

Excelent, thanks for sharing!

[richardrosenman]

Hi eiffie;

Thank you for posting this code! It's awesome!

Is it tough to extend this to the Mandelbulb or other fractals? I played around with it but removing any single object seems to break down most of the script.

-Rich

[eiffie]

Hi Rich I should have posted a link here to another thread where I have updated the code...
http://www.fractalforums.com/fragmentarium/inigo-quilez's-brute-force-global-illumination/

The last code posted shows a bit better how to add fractals. Actually it has a bulb now as a LIGHT!

I am still puttering with it so expect at least one more update. I think it can be made faster.

[tryptophan]

I am stoked to check this out thanks for sharing.

[eiffie]

If you are looking at my code make sure you check the code in the thread mentioned above.
There are a couple of obvious areas for improvement - I didn't handle shadows of reflective objects correctly and the shadows are colored?!?!?
I also didn't use Schlick's approx for determining diffuse vs spec lighting although I remember adding a fake in one version.

I also made an unbiased version (that doesn't cheat toward finding light). It handles fractal lighting well but unfortunately takes FOREVER!