In article <chr### [at] netplexaussieorg> , Christopher
James Huff <chr### [at] maccom>  wrote:

> Hmm...sample initially in a cross or x pattern to find out if a thin
> object goes through the pixel?

Won't work well:  Remember that the ray is infinitely thin, so you will have
some spacing between rays.  Of course, you can make the sampling so small that
is scratches floating-point precision, but I doubt this would really improve
quality.

What can be done with every object with a known surface is to find a few
points on the surface and then start sampling from there (so doing AA with
superpixels first).  It would work for all objects with a single surface or a
number of parts/surfaces assuming you can supply one point for each of them.
However, I don't even want to make any guess about the speed to expect from
such a method.  Not to mention it would only work (in finite time) for primary
rays.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

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