When executing the following code
$fn=200;
translate([0,.1,0])
Disk();
Cut_Ball();

module Ball()
sphere(10);
module Disk()
color("Silver")
intersection()
{ Ball();
translate([-12,-12,3])  cube([24,24,2]);
}
module Cut_Ball()
color("Red")
difference()
{ Ball();
translate([-12,-12,3])  cube([24,24,2]);
}
As the code stands, a red sphere is generated, with a silver disk inside it
and some red/silver area on the circumference of the disk. When removing the
translate instruction in line 2, a uniformly red sphere is produced by
Preview (F5). Also, when changing $fn, the width of the red/silver area
changes.
To me it means that the code is not executed inside-out, as I would expect,
but rather outside-in, or, if you want, the module Ball() is colored first
and only then are the intersection() and difference() instructions carried
out.
Is that intentional?
wolf

PS.: I use version 2015.03-1 on Kubuntu 14.10

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I'd call it a bug.

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