Title: Bad Memories Post by: Kali on December 30, 2012, 12:00:18 AM Bad Memories
(http://nocache-nocookies.digitalgott.com/gallery/13/3869_30_12_12_12_00_17.jpeg) http://www.fractalforums.com/index.php?action=gallery;sa=view;id=13070 Fragmentarium - Kalibox Volumetric lighting raytracer mod - raw render, no postwork Title: Re: Bad Memories Post by: cKleinhuis on December 30, 2012, 12:13:40 AM is this the mandelX implementation ? nice!!!
Title: Re: Bad Memories Post by: Kali on December 30, 2012, 05:53:28 AM No Chris, is my Mandelbox mod (Kalibox) - Just to show the volumetric lighting... I'll try to do the MandelX 3D when I return home, but using bruteforce I think, I'm not so good at finding DE fórmulas...
Title: Re: Bad Memories Post by: subblue on December 30, 2012, 11:34:04 AM Very nice. The volumetric lighting must be expensive. Are you taking uniform steps and then doing a shadow test for each to build it?
Title: Re: Bad Memories Post by: Syntopia on December 30, 2012, 04:00:23 PM Looks great, Kali!
Title: Re: Bad Memories Post by: Kali on December 30, 2012, 06:32:04 PM Thanks subblue & Syntopia!
Very nice. The volumetric lighting must be expensive. Are you taking uniform steps and then doing a shadow test for each to build it? Exactly :) - Couldn't find any good optimization yet (I can think of some but none applicable to a pixel shader) - At least I use big uniform steps, then jitter the coords and use progressive rendering, so I can navigate the fractal to find the scene and then let it render. I made another version where the shadow test is made on each raystep of the DE tracing, then scaling down the raysteps a bit and doing heavy dithering... the results are acceptable but not so faster anyway. Title: Re: Bad Memories Post by: knighty on December 30, 2012, 08:24:15 PM This is too good for bad memories. :)
As for volumetric shadows there are some papers about the subject (for those who are interseted): http://groups.csail.mit.edu/graphics/mmvs/ http://groups.csail.mit.edu/graphics/volumeshadows/ http://www.sfb716.uni-stuttgart.de/uploads/tx_vispublications/espmss10.pdf Title: Re: Bad Memories Post by: Kali on December 30, 2012, 09:12:34 PM This is too good for bad memories. :) Thanks knighty :) - As I'm not very imaginative with titles, I decided to put the first thing that came to my mind after seeing the image. And for my surprise I recalled something bad in my life, nothing terrible but an unpleasant thought... pretty weird how the mind works sometimes (specially mine ;D) Also thanks for the info! |