ance corresponds to the focal length of a camera.
The greater the viewdistance, the more zoomed-up view you get.
<B>:viewdistance</B> returns the current viewdistance.
</DD>
</DL>
<BR>
<BR>

<A NAME="36553"></A>
<B>:view-angle</B> <EM>&amp;optional ang </EM>[method]

<DL COMPACT>
<DT> 
<DD> 
set screen size so that the prospective angle of the diagonal of the
screen becomes <EM>ang</EM> radian.
Note that angles somewhat between 20 degree (approx. 0.4 rad.)
and 50  degree  (0.9 rad.) can generate a natural p