I reintroduced the joining. That produces wrong lighting anyway, but at least it's consistent with what we had before. after 3.0, I'll default the split mirrored vertice behaviour. git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10700 75d07b2b-3a1a-0410-a2c5-0572b91ccdca