"sam kim" <nomail@nomail> wrote in message 
news:web.4990d776a703dd17c859cee0@news.povray.org...
>
> I am teaching high school students ....
> I told the students to use CSG to first model a castle or a tower,
> showing them Gilles Trans' inspiring image, The Chess Game,
> http://www.oyonale.com/image.php?code=204.
>

Sounds quite ambitious for a first project, but I guess it's always good to 
aim high.

You might be interested in the wall generation macro at 
http://lib.povray.org/collection/blockwall/chrisb%201.1.1/blockwall.html in 
this context. It draws each individual block, so you probably wouldn't want 
to use it over very large areas or it might get a bit slow, but it may be 
handy for punctuating the scene with specific features. There's a predefined 
example with a tower containing a spiral staircase in with the source.

Regards,
Chris B.

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