New feature of Vray 2.0: Support for bidirectional path tracing

[WobiNich]

Hi,

In the feature list it says there is "Support for bidirectional path tracing for accurate unbiased lighting solutions". So I wonder what exactly does this mean? Is there a new feature for indirect illumination or is this just because RT is now included in the package (as RT uses bidrectional path tracing, I guess(?))?

[vlado]

V-Ray RT is different; the bidirectional path tracer is there, but it's not in its final version yet.

Best regards,
Vlado

[yyk]

So is this hidden in the current beta and if so, is it possible to activate it? Or am I missing something here, can't find it

[jacksc02]

There is a "helper" for it called VRayBPtracer

[yyk]

Thanks, found it.. interesting stuff!

[Jiri.Matys]

Itas working, but when i delete helper, vray still compute in bidirectional way. How to disable it? Disable enable tick in helper didnt work.

[jacksc02]

You need to clear your delete history or save your file and restart max.

[Jiri.Matys]

How can I clear delete history?

[Dariusz Makowski (Dadal)]

Humh, I've never hear of that bidirectional ray tracing.... is it any faster/better than the normal one?

[Paul Oblomov]

It is just like in maxwell.

[Dariusz Makowski (Dadal)]

I dont know/have maxwell ;s

[stevesideas]

What is bi-directional tracing ?

[Paul Oblomov]

Hope this will help.
It is unbiased rendering algorithm, used in many unbiased render engines nowadays.
http://graphics.ucsd.edu/~iman/BDPT/

[Dariusz Makowski (Dadal)]

Humh it looks like BI is a lot cleaner... but with some weird hot spots... What about speed?