Among other things, Ross wrote:

> I think he means (or atleast I think I mean) that while the sphere is
> within the focus, the reflection isn't. The reflection "sits" on top of
> some wood. those wood tiles are very blurred, but the reflection of the
> sphere on that same blurred wood is very sharp. Optically, how can this
> happen that one thing in an area is blurred and another thing in that area
> is not blurred?

But the reflection is technically further away than the surface. It is at 
the same distance as the "real" sphere, so it is focused. It's the same 
effect as when looking through a painted glass, you can see whatever 
there's at the other side more or less clearly, while the painted glass' 
surface is blurred.

-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

Post a reply to this message