Hi,
I have searched trough the forum but couldn't find any discussion about this. Amongst many advantages of Cinema 4D over 3ds Max I find this one that is implemented in r18 really awsome, and that is reflections preview and displacement (tessalation) preview. Those would be huge help. Another one that would be great is the possibility to somehow import substances directly to corona or convert cinema 4D substance material to Corona without need of manualy import and change substance shader. Cheers