rt use precalculated imap for gi.

[theedge]

Don't know if the PPT workflow has changed since the last updates, but here's how I used to set it up :

* STEP 1 : set both primary and secondary engines to Light Cache and set it to "Progressive path tracing" mode
* STEP 2 : hit render

[3LP]

Thanks

Stan

[Alan Iglesias]

...Is there any tutorial about how to une the PPT?
I would love to try that out!

Hmmm..."une" could meant "tune" or "use" I guess.

Just in case you meant "use"...

Progressive Path Tracing is the standard rendering method when you use Vray RT. Traditionally it is quite slow compared to GI biased methods (IM, LC, etc.) but with the advent of multiple GPU cores working simultaneously it is becoming a viable alternative, at least for previewing lighting, materials and such. Some are even able to use it for final rendering work when they can get around certain things that RT cannot do yet, as well as noise-related issues (getting noise-free rendering, especially in some interior scenes is perhaps the toughest thing that PPT has to do).

My point is that RT/GPU, in its natural state, brings to the table much more than just faster rendering. It also improves the look and feel of the rendering greatly because the image quality is not taking any hits from IL, LC, or other biasing issues. Kinda like shooting pictures with a constant low number ISO in any light level. Not only that, but as my limited testing to this point would attest, I'm pretty sure that all the animation issues with using GI and moving cameras and objects should disappear completely!

-Alan