Author Topic: Bidirectional path tracing added! (Read 23615 times)

Ondra · 2012-10-18, 23:41:22

I've finally completed the bidirectional path tracing implementation. It is new unbiased GI method, much faster in certain difficult scenes.

Comparison with path tracing:

Caustics-heavy scene (the patterns on ceiling are caustics)

racoonart · 2012-10-18, 23:46:11

new toys available in the daily builds soon? ;)
Looks awesome btw! :)

Ondra · 2012-10-18, 23:47:27

soon ;) - as soon as I decorrelate direct lighting, and make it work with ideally specular materials

alieneye · 2012-10-18, 23:49:53

great!

racoonart · 2012-10-18, 23:51:13

Do you think "fancy lots-of-small-windows-cathedral scenes" will be faster with the new bidirectional path tracing? Tried some animation tests today and I came to the conclusion that i will have to wait for faster sampling stuff ;)

michaltimko · 2012-10-19, 00:08:56

Seen it on fb, looks awesome. Looking forward ;)

Ondra · 2012-10-19, 00:40:22

Quote from: DeadClown on 2012-10-18, 23:51:13

Do you think "fancy lots-of-small-windows-cathedral scenes" will be faster with the new bidirectional path tracing? Tried some animation tests today and I came to the conclusion that i will have to wait for faster sampling stuff ;)

No, it won't probably help with this...

maru · 2012-10-19, 20:35:12

Awesomeness!

Ondra · 2012-10-23, 14:42:32

I've moved the offtopic discussion about localization here: http://forum.corona-renderer.com/index.php/topic,164.0.html

lacilaci · 2012-10-24, 20:48:32

incredible...

woshilvba · 2012-10-27, 17:19:03

Quote from: Keymaster on 2012-10-18, 23:41:22

I've finally completed the bidirectional path tracing implementation. It is new unbiased GI method, much faster in certain difficult scenes.

Comparison with path tracing:

Caustics-heavy scene (the patterns on ceiling are caustics)

It can improve the the diffuse reflection rendering speed?

Ondra · 2012-10-27, 20:35:51

It can greatly improve various configurations, with diffuse or specular materials

maru · 2012-10-27, 22:12:36

Does it have any disadvantages?

Ondra · 2012-10-27, 23:09:29

yes, its slower in simple scenes (with no caustics or highlights), and does not handle SDS (specular-diffuse-specular) paths well - you can see that in the glossy cornell box - the reflection on the left box of the caustics on the floor

lacilaci · 2012-10-28, 18:09:25

Will it be possible to disable caustics themselves but still use bidir for complex interior like scenes, expecting some rendering speed gain?

Ondra · 2012-10-28, 18:24:01

that would introduce unnecessarily large bias. I'll rather implement the "max PT intensity" spinner for bidir. That way only caustics causing problems will be clamped, in smoothly user-controllable way

lacilaci · 2012-10-28, 18:35:20

That sounds good. And I guess, that it could resolve issue with fireflies from caustics seen in reflection as well right?

Ondra · 2012-10-28, 18:45:24

Dom74 · 2012-10-31, 14:30:35

Can you tell us when will whe have this new release ?
thanks.

Ondra · 2012-10-31, 15:03:53

It will take at least 2-3 months to gather enough new features to warrant a release.

But active testers (e.g. frequently posting renders/bugs) get access to daily new builds (which are sometimes quite unstable)

Dom74 · 2012-10-31, 16:32:42

So, How to be an active tester, I'm very enthusiastic about this renderer, want to go ahead.

Ondra · 2012-10-31, 17:17:41

Quote from: dom74 on 2012-10-31, 16:32:42

So, How to be an active tester, I'm very enthusiastic about this renderer, want to go ahead.

create some nice images with corona ;)

Ludvik Koutny · 2012-10-31, 17:17:56

Quote from: dom74 on 2012-10-31, 16:32:42

So, How to be an active tester, I'm very enthusiastic about this renderer, want to go ahead.

Reporting lot's of bugs, contributing actively to the forum, contributing to the forum gallery, showing some initiative in general ;)

Dom74 · 2012-11-01, 14:39:32

Ok, I will do that.
thanks.

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Author Topic: Bidirectional path tracing added! (Read 23615 times)