126.96.36.199 Isosurface not rendering properly?
"My isosurface is not rendering properly: there are holes or random noise or big parts or even the whole
isosurface just disappears."
The most common reason for these type of phenomena with isosurfaces is a too low
evaluate to make POV-Ray calculate a proper
max_gradient for the isosurface (remember to
specify a sensible
max_gradient even when you use
evaluate or else the result may not be
Sometimes a too high
accuracy value can also cause problems even when the
ok. If playing with the latter does not seem to help, try also lowering the
Remember that specifying a
max_gradient which is too high for an isosurface, although it gives the
correct result, is needlessly slow, so you should always calculate the proper
max_gradient for each
isosurface you make.
Note that there are certain pathological functions where no
help. These functions usually have discontinuities or similar "ill-behaving" properties. With those you just
have to find a solution which gives the best quality/speed tradeoff. Isosurfaces work best with functions which give