Sorry if this has been asked before, but I have a puzzling problem with an
isosurface I am using.  When I trace the scene I get a warning that the
max_gradient is about 8+ and I need to increase it or I'll get holes.  So I
do, and trace again, but then I get a message saying max_gradient is 7.1
and I should reduce it to make it trace faster.  This happens even though I
haven't changed anything except the max_gradient value.  I can chase the
max_gradient value around indefinitely but no matter what I do it always
gives me either the 'too big' or 'too small' message and keeps changing.
Why does this happen and is there anything I can do to correct it?

L
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