Photon Mapping Update
---------------------

Memory optimization:  Uses less than half of the memory that it used to (46%).

Syntax changes: "density" switched to "separation", other changes (see
documentation).

Speed optimization:  Probably not noticeable

New adaptive search:  New thresholds employed.  Read the documentation for more
information.

New features:
	added max_trace_level for photons
	added adc_bailout for photons
	ability to turn union splitting on/off on a per-object basis (use split_union
yes/no in the union)

Bugs fixed:
	no more crashes with gather greater than 300
	shouldn't crash for animation anymore
	area lights work as expected
	spot lights work as expected
	cylinder lights DO NOT work as expected - working on that

I also incorporated the lathe speed improvements from 3.1e (but not all other
3.1e stuff).

One last thing... there's a paper that I wrote (in postscript format) that
details what I did so far with photon mapping (for my directed study for
school).

-Nathan

Ken wrote:
> 
>  Thank you Nathan. Could you detail the changes that were made in
> this release so I may help answer those who are bound to ask this
> very question in the coming weeks ?
> 
> --
> Ken Tyler
> 
> mailto://tylereng@pacbell.net

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