|
 |
"M_a_r_c" <jac### [at] wanadoo fr> wrote:
> news:web.447b0af0f93ecc724de801770@news.povray.org...
> > Oh... it looks great to me too..... all I mean is... why did "hollow on"
> > work so well? And why did "hollow off" cut away the atmosphere? Just
> > trying to learn POV-Ray...
> >
> Well as said said Tim, POV discs are like POV planes. They are both a
> surface without thickness and a half-space i.e. it cuts the whole POV
> universe in 2 halves : outside and inside
> "The inside of a disc is the inside of the plane that contains the disc.
> Also note that it is not constrained by the radius of the disc." (doc
> 3.4.2.2).
> in fact it seems that a disc is a plane which surrounding and hole are
> transparent .
> Now the inside of an object may perform media only if it is declared as
> hollow.
>
> Why does a plane have an inside as many other POV primitives? It is useful
> when you want to make a sea with an interior (fade_color, media etc..) or in
> CSG to cut an object by difference or intersection.
>
> Marc
OoOOoOoohh!!! OUTSIDE and INSIDE.... ok thanks for explaining this Marc, and
thank you Tim for providing the clue about "hollow on" for discs.
For a special treat, I'll re-render my ringed planets and post them over a
few weeks... (I'm giving myself a few weeks because I have a busy
schedule...)
Post a reply to this message
|
|
