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Path Tracing

Name: Anonymous 2013-03-26 13:03

Hi /porg/, Greetings from /3/.

Did you know that modern GPUs are now fast enough to do path tracing in real time?
http://www.youtube.com/watch?v=FJLy-ci-RyY

Yep, it's essentially ray tracing in real time.  Soft shadows, ambient occlusion, indirect lighting, reflection, and refraction, all in real-time.  In fact, you can even do it in a web browser.
http://madebyevan.com/webgl-path-tracing

Have a nice day /porg/.

Name: Anonymous 2013-03-26 13:13

NVidia GeForce already had photorealistic lights:
http://developer.download.nvidia.com/SDK/9.5/Samples/samples.html
This example demonstrates hardware-accelerated "ambient occlusion" using a hemisphere of shadow-mapped lights. Each light is rendered in a separate pass, and the results are summed together using a floating point accumulation buffer. The projection matrix is randomly jittered to provide anti-aliasing.

Name: Anonymous 2013-03-26 13:15

>>1
That's not real time, that's interactive rates.

If it was real-time, you wouldn't see it redrawing the scene.

Name: Anonymous 2013-03-26 13:18

/3/DPD

Name: Anonymous 2013-03-26 13:30

>>1
that is a lot of noise there. can't they average it or something?

Name: Anonymous 2013-03-26 13:46

http://http.developer.nvidia.com/GPUGems/gpugems_ch17.html
A large number of lights (128 to 1024) is required for good results, but the performance of modern graphics hardware means this technique can still be faster than ray tracing. The distribution of the lights on the sphere also affects the final quality. The most obvious method is to use polar coordinates, with lights distributed at evenly spaced longitudes and latitudes, but this tends to concentrate too many samples at the poles. Instead, you should use a uniform distribution on the sphere. If the object is standing on a ground plane, a full hemisphere of lights isn't necessary—a dome or a hemisphere can be used instead.

© 2003 NVIDIA

Name: Anonymous 2013-03-26 14:40

>>5
That's what they are doing.  The averaging just takes several frames before it smooths out.  I was thinking it might be better to reduce the frame rate a little, maybe by half, then you wouldn't see most of the graininess.

>>2,6
Shadow mapping != path tracing.  Path tracing gets you a lot more realism than just soft shadows and ambient occlusion.

Name: Anonymous 2013-03-26 14:45

>>7
Path tracing gets you a lot more realism than just soft shadows and ambient occlusion.
Yeah. It gets you WHITE NOISE!11

Name: Anonymous 2013-03-26 14:47

My old TV does path tracing without a GPU: http://www.youtube.com/watch?v=PH54cp2ggFk

Name: Anonymous 2013-03-26 14:48

>>8
racist scum, check your privilege

Name: Anonymous 2013-03-26 14:49

>>9
How can it process graphics without a gpu wiselguy?

Name: Anonymous 2013-03-26 15:02

The only good realtime raytracing demo is http://www.youtube.com/watch?v=pm85W-f7xuk and it was done by Japanese.

Name: Anonymous 2013-03-26 15:18

this is truly an engineering achievement and not programming

engineers are like God they create the material and then the programmers who play human go and manipulate the material to advance their civilization

Name: Anonymous 2013-03-26 15:26

>>13
what if the programmers made engineer AI who could cultivate material and build and dynamically learn to use the material in their world to build new shit, then they built a program that had equivalent engineers?

Name: Anonymous 2013-03-26 16:10

>>14
Then programmers have created the closest thing we will know to a god.

Name: Anonymous 2013-03-26 16:13

>>15
but the engineer created the tools needed to do it so didn't the engineer create it?

Name: Anonymous 2013-03-26 16:37

>>14-16
Mentifuck landing in 1...2...3...

Name: Anonymous 2013-03-26 16:44

>>13
and the mathematicians are g-d's parents

Name: Anonymous 2013-03-26 16:47

Arthur T. Murray (ATM) was the independent AI scholar,
who from early boyhood followed multiple interests in
electronics, linguistics, chess, religion, magic,
science fiction and so forth into a culminating life-long
quest for the devising of a thinking computer
created in the image and likeness of Homo sapiens.

View some Flickr photos that Mentifex has found interesting:
http://www.flickr.com/photos/10321968@N07/3274363685/
http://www.flickr.com/photos/10111/96368399/

Name: Anonymous 2013-03-26 17:37

TRACE MY ANUS

Name: Anonymous 2013-03-26 19:12

>>17
/prog/ is not your personal reblogger
Don't change these.
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