Bad Memories

[Kali]

Bad Memories



http://www.fractalforums.com/index.php?action=gallery;sa=view;id=13070


Fragmentarium - Kalibox

Volumetric lighting raytracer mod - raw render, no postwork

[cKleinhuis]

is this the mandelX implementation ? nice!!!

[Kali]

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...

[subblue]

Very nice. The volumetric lighting must be expensive. Are you taking uniform steps and then doing a shadow test for each to build it?

[Syntopia]

Looks great, Kali!

[Kali]

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.

[knighty]

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

[Kali]

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  )

Also thanks for the info!