Re: backward ray tracing

Helpful person <rrllff@xxxxxxxxx> wrote in news:3cc0512f-a127-4ca8-8cf3-
ea94cff7ef4b@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

There was definately an accuracy problem in the old days of double
precision ForTran programs. However, although this should not still
be the case I have found it to be so.

Haven't they heard of arbitray precision? A fractal program I had
from the old days of DOS could do arbitrary precision to mind-numbingly
large values that were only limited by your CPU power and patience.
Back in the days of 386's, you had to be REALLY patient.

Brian
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