Hello Greg L.,
I looked at your MIRROR.PRJ file a minute ago. You seem to have run into a
mirror-clipping event.
If you set MIRROR-CLIP-ANY=ON in the 3DS.SET file, the mirror will reflect
properly with the .prj file exactly as uploaded. Check out the section about
flat mirrors in the 3DS manual.
(Never saw so many spot lights in one scene!)
JKJ
Great. Remember that this problem will show up if an object simply intersects
the _plane_ of the mirror – it doesn't have to intersect the actual mirror.
Check out the manual for more detail.
JKJ