This is pretty great – The C4DZone posts a new plugin for Cinema 4D that will cap a hole using faces that are all quads, using no n-gons. The QuadCaps Plugin will take a loop selection and cap it off using all quads with the click of a button.
QuadCaps is a Cinema 4D R13/14/15 plugin that helps user to close polygon hole with quadrangular mesh without creating Ngons
All you really need to do is select an edge loop, call the QuadCaps tool, and the polygon will be closed with a quadrangular mesh. The selected edge loop needs to have an even number of edges for the plugin to create all quads. If there are an uneven number of edges, there is another tool that will reduce the number of edges and generates a triangle. QuadCaps works with Cinema 4D R13/14/15 (Prime, Broadcast, Visualize, Studio).
Check out the QuadCaps Plugin for Cinema 4D here.