hi, I have two question regarding subD,
1 why the edge sometimes is curved and sometimes is straight? like in pic1, and how can i specify i want it straight,( like a crease) 2 can I make append face as a polygon instead than a curved also when toogle subd display is on?
You can use the crease or uncrease commands vertices as well as edges.
Creasing a vertex will have a different effect from creasing an edge.
ah cool, so I just need to select vertices and use crease uncrease. good thank you
