Surface from 4 Points

	A quick way to get a starting surface is to use a primitive Plane to create a degree 3 (order 4) patch.
	The only tool that creates a surface from corner points is Square. You need to specify four points, and these can be placed freely on a work plane, curve snapped (Ctrl + Alt on Windows, Control + Command on Mac) to raw or scan data, or snapped to existing geometry.
	The Surface EditFit Scan tool tries to match the square patch to scan lines.
	The Point Cloud palette has tools for creating surfaces on raw data.