Maps world-space curves onto the target surface, similar to mapping a texture onto a surface during rendering.
Set the world space axes (X, Y, or Z) that correspond to the U and V directions of the surface.
Parameter Base – Proportionally map the defined area of world space to the parameter space of the surface. If the surface has irregular placement of edit points, as in the following example, the mapped geometry is distorted.
Arc Length Base – Proportionally map the defined area of world space to the arc length of the surface.
These values define the area of world space that corresponds to the U and V parameter space of the surface.
For example:
Save the history of the projection for later editing. If you turn Create History on, you can modify the curves that were used to create the projected curves, and the projected curves will update.