A method for constructing arbitrary-plane and multi-arbitrary-plane mosaic composite images from a multi-imager is disclosed. A first homography set is generated for a multi-imager based on a first reference plane. A second homography set is then generated for the multi-imager based on a second reference plane, where the second reference plane is distinct from the first reference plane. The first homography set and the second homography set are then utilized to generate a third homography set for the multi-imager based on an arbitrary plane. In so doing, the arbitrary plane becomes repositionable with respect to a scene that the multi-imager is viewing. Multiple such arbitrary planes may be selected in constructing multi-planar mosaic composite images. Multiple such second reference planes may be presented to provide improved quality derivation of the said third homography set.