Hi. ,I was wondering if you could help me with a problem: when I try to walk on a terrain that I created in Rhino and imported into DATAsmith,it immediately falls to the ground in walk mode. Does ...

Hi. ,I was wondering if you could help me with a problem: when I try to walk on a terrain that I created in Rhino and imported into DATAsmith,it immediately falls to the ground in walk mode. Does anyone know how to solve this problem? Please teach me.