A vision system for a vehicle includes a plurality of cameras having respective fields of view exterior of the vehicle. One of the cameras functions as a master camera and others of the cameras function as slave cameras. Responsive to processing of captured image data, the vision system is operable to synthesize a composite image derived from image data captured by at least two of the cameras, at least one of which is a slave camera. Operating parameters of the master camera are used by slave cameras. An electronic control unit sends via Ethernet connection operating parameters to a slave camera so that image sections of the composite image, when displayed to a driver of the vehicle by a display device of the vehicle, appear uniform in at least one of (i) brightness at the borders of the sections and (ii) color at the borders of the sections.