Please help, problem with converting to subdiv
hello everyone
I downloaded the ninja modeling tutorial and I am stuck with a problem. after making the half face neck and ear I combined the neck with the face and joint the vertices and the face perfectly converted to SubD. but when I combine the ear to the face and joining the vertices I get an error that it can not convert to subd because the object needs cleanup. I do that but still it is not working. would anyone please help me
rsh