Alex Falappa wrote:
> 
> POV beta 9
> 
> -In section 2.6.2 the second paragraph says: "Photon mapping is a technique
> which uses a backwards ray-tracing pre-processing step to render refractive
> and reflective caustics realistically..." but in my opinion the photon
> mapping tecnique can be considered a forward ray-tracing pre-processing step
> not backwards.
> Could Nathan Kopp confirm this?

I think this depends on your definition.  It's backwards in relation to
conventional raytracing and forward in relation to the real physical
effects.  I'm not sure which definition is the more common one.

AFAIK Henrik Wann Jensen's papers and books do not commonly use either of
these terms, but Nathan regularly used 'backwards ray tracing' in his
texts so it's at least consistent this way.

> 
> -The triangle texture and variable reflection are listed both in section
> 2.6.12 and 2.6.8

Sounds like a mistake. Ingo...?

> 
> - The media speed enhancements are listed both in section 2.6.13 and 2.6.9
> 

I'm not sure if they both cover the same change, .9 refers to the new
methods while .13 could mean some general optimization.

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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