## Accelerating path tracing by eye path reprojection

Discussion related to the implementation of new features & algorithms to the Core Engine.

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### Accelerating path tracing by eye path reprojection

Interesting paper here, could this be easily added?

http://www.rendering.ovgu.de/rendering_ ... roject.pdf

Note on the end they talk about using the method with bidir. Do we already do this? I can't recall. I know you do it for some vertexes, but all?
May contain traces of nuts.

Lord Crc

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Joined: Sat Nov 17, 2007 2:10 pm

### Re: Accelerating path tracing by eye path reprojection

Hi,

I had tried to implement something similar in Lux a while ago (in 2008, in was the path2 integrator), however I had issues weighting standard paths and so called reconstructed paths, so the results were not accurate.
Worth investigating some more I guess...

Jeanphi
jeanphi

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### Re: Accelerating path tracing by eye path reprojection

Well, I was thinking that since you now have gotten the weighting sorted bidir (at least, not far from it), perhaps the necessary infrastructure and knowledge was there to make this somewhat easy to implement. For some value of easy
May contain traces of nuts.

Lord Crc

Posts: 4518
Joined: Sat Nov 17, 2007 2:10 pm

### Re: Accelerating path tracing by eye path reprojection

Hi,

Actually it's not that easy because with the current infrastructure you would have to compute the probability of a path landing at a given point, which is unfeasible in any practical amount of time so you have to take another route: estimate the reconstructed picture and mix it with the standard render using a posteriori weighting.

Jeanphi
jeanphi

Posts: 6624
Joined: Mon Jan 14, 2008 7:21 am