Fixed rendering errors when ground is not in the XZ plane
Fixed rendering errors when ground is not in the XZ plane

elkingtonmcb/simbody,elkingtonmcb/simbody,elen4/simbody,chrisdembia/simbody,elen4/simbody,scamille/simbody,Gjacquenot/simbody,elkingtonmcb/simbody,simbody/simbody,Gjacquenot/simbody,chrisdembia/simbody,chrisdembia/simbody,robojukie/simbody,robojukie/simbody,scamille/simbody,simbody/simbody,robojukie/simbody,Gjacquenot/simbody,scamille/simbody