I'm having difficulty in creating a surface from 3 points. This surface "covers" a corner made from 3 surfaces. I've attached a picture to show what I am explaining. Surface B is a vertical surface and Surface A is a horizontal surface. Surface C makes contact with and tangential to Surface B and Surface A at points 2 and 3 respectively. L1,2 lies on B and L1,3 lies on A. The resulting surface should be tangent to Surface A. It looks like what I need is a loft but I can't do a loft from a point to a line. Would anyone have any suggestions to getting this?