1. A vision system for a vehicle, said vision system comprising: at least one image sensor disposed at a subject vehicle and having a field of view exterior of the vehicle; wherein said at least one image sensor comprises a forward facing camera disposed at the subject vehicle; an image processor operable to process image data captured by said at least one image sensor; a control, wherein said control, at least in part responsive to processing of captured image data by said image processor, is operable to generate an avatar representative of at least one object or scene segment in the field of view of said at least one image sensor; a display for displaying images indicative of captured image data and for displaying the avatar for viewing by a driver of the subject vehicle; and wherein said vision system is operable to display an avatar that is a representation of an object that is only partially viewed by said image sensor to enhance the display for viewing and understanding by the driver of the subject vehicle.