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I have a question about isosurfaces in MegaPov 0.4. I read two
tutorials on them, and in both, when a function such as x^2-y is used,
the tutorial shows a picture where all of the bounding box below the
graph of the equation is filled, kind of like the graph of y<x^2.
However, when I tried the same function, only a two-dimensional surface
similar to the graph of y=x^2 is shown. What is going on? Here is the
code for my isosurface:
isosurface {
function { x^2-y }
contained_by{ box { -2,2 } }
threshold 0
sign 1
accuracy 0.001
pigment {rgb .9}
finish {phong 0.5 phong_size 10}
}
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