"Andrea Ryan" wrote:
> #declare Start = <xtrans,10000,ztrans>;
> #declare Inter =
> trace ( Island, Start, <xtrans,-10000,ztrans>);
>
> object { tower translate <xtrans,0,ztrans>+Inter*y }

The third parameter in trace is a direction, not a point.

Try the following (not tested):

> #declare Start = <xtrans,10000,ztrans>;
> #declare Inter =
> trace ( Island, Start, -y);
>
> object { tower translate Inter }

Hope that helps!

Rune
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