A mechanism for automatically calculating loft surfaces from raw 3D scan data represented as a mesh or point cloud model is discussed. Users enter parameters related to the loft surface calculation via a provided user interface. User input and/or programmatically calculated parameters may include U-V direction, guide curve identification, and the amount of allowable deviation error between the calculated loft surface and the 3D scan data. Profile curves meeting the given parameters are then generated and a loft surface is calculated using the generated profile curves for a selected region. The user may select geometrically separated regions in order to create a single loft surface that connects the separate regions.