This is an asset we built while working on an interactive projector wall project for NTMOFA (National Taiwan Museum of Fine Arts). The project required us to create a seamless panorama using multiple projectors onto a curved surface. We ended up building an adjustable camera asset which positioned multiple cameras into a row/column with overlap for the panorama.
Each orthographic camera is rendered onto a render texture that is projected onto a plane that can be adjusted to fit any shaped surface. The overlapping region is blended using a custom substance mask and shader that we built to avoid overly intense overlap regions.