John VanSickle wrote:
 > What would be the difficulty in programming anti-aliasing regions, 
such that
 > any pixel whose ray was shot into the region would be anti-aliased at a
 > certain level?   I picture syntax such as:
 >
 > antialias {
 >   box { <-1,1,1>,<2,4,4> }
 >   depth 3
 >   precision .1
 > }

Warp wrote:
>   I think that it would require that if the ray hits the object which has
> to be antialieased for the first time in the current line, we have to go
> back one pixel and render it again antialiased.
>   And thinking about it, it would also require rendering the same pixel in the
> previous line again the first time we hit the object vertically.
> 

If we realy wanted such a feature, wouldn't it be better to define
it based on pixel rows/columns, analogous to the "partial render"
feature alredy found in POV?
And then, of course, there could be a preprocessing step
to derive the columns/rows of the bounding box of a given object.

Hermann Vosseler

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