On Sat, 19 Sep 1998 21:46:45 -0400, Nathan Kopp <nk8### [at] ltuedu>
wrote:

>Ok... there seems to be a bug in POV's sphere scaling code.  If you have a
>sphere and you scale it uniformly, it will simply multiply the radius by your
>scale factor instead of using a transformation matrix.  This is a speed
>improvement under some circumstances, but it seems to lead to a bug when
>the radius is veryu small.  

Here's the culprit, from the windows config.h file:

#define EPSILON 1.0e-5

I changed this to 

#define EPSILON 1.0e-12

and, for good measure, added

#define SNGL double
#define COLC double

and the problem went away.

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