Trevor Quayle wrote:

> (actually to be fair to myself, the usage of the scale factors and
> contained_by command aren't explained fully, i.e., perhaps it should be
> specified that the default contained_by object is a box -1 to 1 and that you
> should explicitly define a contained_by object)

Contained_by had always been mandatory with isosurfaces (i.e. Megapov complained
about not finding a contained_by and stopped).
The behaviour is different now and you're right to say that the existence of a
default container should actually be mentioned in the doc.

G.

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