Changing to :

contained_by { sphere{0, 1.1} }
max_gradient 30
accuracy 0.1

Gave me a red sphere after 5 min.
(using object {Apple scale 1 texture {pigment {color Red}}} )
   camera {location  <0.0, 0.0, -10.0> look_at   <0, 0, 0>}

Message window:

Ray->Shape Intersection          Tests       Succeeded  Percentage

Parametric                       32428           18225     56.20
Parametric Bound                 37710           32428     85.99
Bounding Box                    387070           75420     19.48

Function VM calls:        281215195

I'm unsure how to interpret this output.  Do I need to increase my contained_by
size to 1.28  (1.1/0.86)?  Or do I need to double it because Parametric
Percentage is down near 50%?

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