Oops!
>>camera {> FieldCam (CamPos, CamLook)> perspective> location CamPos
I've just realised that I left out a bit....mea culpa, mea culpa, mea maxima
culpa.
camera {
FieldCam (CamPos, CamLook, Rescale)
perspective
etc.......
is how the example should read.
John
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