Unbiased Randering and Caustics

[deflix]

Isnt blender render engine open source? And cycles? I thought they were open huhh

Ahh I see what you mean - yes blender is open but its not the same thing really: I guess I see an engine as something that resolves many things in real-time, not just light transit. I wouldn't describe an offline renderer as an engine for this reason. Brigade is being developed specifically for games development in mind; to resolve a dynamic and changing environment such as that in a game with physics, animation, rigging and so on. Imagine a feature rich real-time engine based around PT rendering such as Brigade on future graphics hardware. That's how awesome the potential is and why I feel an open source approach would be great.

[deflix]

When can I have that?!?!

You can get an old version here - http://igad.nhtv.nl/~bikker/
For a newer Alpha I suggest contacting OTOY

[deflix]

Here is a good article about OTOY, Brigade and Octane.

http://www.fxguide.com/featured/octa...e-ray-tracing/

and a paper - http://www.google.co.uk/url?sa=t&rct...,d.ZWU&cad=rja

enjoy!

[sersia]

Hi,

"Photon Parameterisation for Robust Relaxation Constraints" looks pretty cool to remove the noise from caustics.

EG2013: http://cs.swan.ac.uk/~csbenjamin/zetarelax.html
(Video): http://vimeo.com/57395372

[vlado]

"Photon Parameterisation for Robust Relaxation Constraints" looks pretty cool to remove the noise from caustics.

This is patented last time I looked into it. So forget about it

Best regards,
Vlado

[sersia]

This is patented last time I looked into it. So forget about it

Best regards,
Vlado

aha! I got it.

Thank you for your reply.
Have a nice weekend ahead.

[Neilg]

This is patented last time I looked into it. So forget about it

Best regards,
Vlado

Is the reason you never play with patented tech because of the problems it can create down the line, or is it a principle thing of refusing to pay and get a license for a bit of maths? Does anyone (other engines) play with patented tech?
Seems to me that there's an awful lot of incredible features which render engines cant use because they're locked up in patents.

[vlado]

Is the reason you never play with patented tech because of the problems it can create down the line, or is it a principle thing of refusing to pay and get a license for a bit of maths? Does anyone (other engines) play with patented tech?

To be fair, the guys that wrote that paper in particular did approach us to see if we were interested in licensing it. I was not convinced it was worth though (I'm still not). I'm not against licensing stuff where we think it could be useful (f.e. we did license MetaSL, although as far as I can tell, that turned out to be money down the drain).

Best regards,
Vlado

[Neilg]

Thanks for the info

[Morbid Angel]

I could see how licensing a technology that would dramatically speed up your rendering over all would be beneficial. But caustics on its own, is such a thing that is not used widely and the small number of people who tend to use them get about getting the caustics done in old fasion ways. This will not make the effort worth wile in my opinion.

Im not sure of the purpose of MetaSL is it used in games or is there a general application for rendering with it? what would be benefits of using it?

[vlado]

Im not sure of the purpose of MetaSL is it used in games or is there a general application for rendering with it? what would be benefits of using it?

It was mostly because we were often be asked if one could write shaders for V-Ray easily and MetaSL was a way to get a shading language. But it did not get developed...

Best regards
Vlado

[vlado]

Here is a small test of the current vertex merging implementation.



Best regards,
Vlado

[vlado]

And another one:



Best regards,
Vlado

[vlado]

A comparison between regular bidirectional path tracing and bidirectional path tracing with vertex merging for the same amount of render time.

Pure bidirectional path tracing:


Bidirectional path tracing with vertex merging:


Best regards,
Vlado

[vlado]

And one more...



Best regards,
Vlado