This was storing the original object matrix, which builds on the assumption that obmat is modified during dupli construction, which is a bad hack. Now the obmats are still modified, but this only happens outside of the dupli system itself and the original ("omat") is stored as local variables in the same place where the obmat manipulation takes place. This is easier to follow and avoids hidden hacks as much as possible. Reviewed By: campbellbarton Differential Revision: https://developer.blender.org/D254