Thomas Fernique reported the following bug by private email: from the console, some flat polygons in three-space lead to an empty picture with jmol (java version), for example:
sage: polygon([(0, 0, 0), (1, 0, 0), (1, 0, 1), (0, 0, 1)])
However, this is correctly displayed with jsmol (javascript version) from the notebook.
I can reproduce this bug on Sage 6.8, Debian GNU/Linux jessie 64 bit, openjdk-7-jre.
CC: @seblabbe
Component: graphics
Reviewer: Travis Scrimshaw
Issue created by migration from https://trac.sagemath.org/ticket/19274