Gilles Tran wrote:
> 
> Some of the radiosity effects are really OK. Vicky's face is nicely lit,
> and there's even a backlit effect on her right arm. The shadow of the
> chair on the left seems good too. On the bad side, there are quite a
> number of radiosity artifacts visible on the right wall and on Vicky's
> face and right foot (note : raising the recursion level to 2 had
> appalling effects on Vicky so I left it to 1). Also, I had to add
> reflection to the chairs to make them look better, which lets me think
> that one last thing to improve in Megapov radiosity is it's ability to
> react like a regular light with some of  the texture properties
> (highlights). I didn't try to "cheat" with light groups or area lights
> to fix that, though I'll do it probably on a real pic.

There doesn't seem to be anything we can do about the artifacts. I think
it's a flaw in the current algorithm, it's not optimised for really low
error_bound, and there's no way around it except rewriting the code.
Whoever wrote it (Nathan?) would know more about that than I would, though.

The only thing I can think of is to turn the count WAY up, use a tiny,
tiny pretrace_end (values lower than 0.01 seem to be valid on large
images, so you could give that a shot), and maybe increase some other
thing to 20 (I can't remember what it was off the top of my head,
probably was nearest_count.. but whatever it is, it maxes out at 20, so
you can check the dox for it). I doubt that'll get rid of the artifacts,
but it might smooth them a little more.

The artifacts aren't all that noticible to begin with, though. You could
probably ignore them altogether unless they really make your scene look bad.

It might be safe to add photons to the floor; I haven't done extensive
testing, but they didn't have a dramatic effect on my bonsai tree render
(the shiny part of the table thingy had photons). Come to think of it,
they didn't have a dramatic effect on the output either, but.. eh, whatever.

You might add some texture to the plain wall and the ceiling; not only
would it look a little more interesting, but it would probably break up
the artifacting on the right wall.

The wallpaper IS hideous.

The window could use some glass, or something.

The bookcase could probably benefit from a slight application of that
"fake highlight" reflectivity, and the floor might look better if it was
a little more reflective, and blurry.

Some media would be nice too.

Oh, and you could buy a second computer to use while the first one
renders this thing with media, photons, a ridiculously high radiosity
count, isosurfaces and/or normal_on (for the wall and ceiling textures),
and reflection blur... ^^;;

(2006, man. It's only six years away...)

-Xplo

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