[pstricks] strange behavior in pst-3d

[Nitecki, Zbigniew H.]

The fairly simple code in the attached tex file generates the (correct) picture attached below.
However, when I copy this piece of code into a (much) larger file, inside a figure environment, the dashed line defined on the line indicated appears horizontal, basically touching the lower
corner of the horizontal square (unfortunately, I don't know how to take that output and attach it here, without attaching the whole 35-page output in which it is embedded).  What could cause this, and how do I test for it?



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