An apparatus comprises receivers (201, 203) receiving texture maps and meshes representing a scene from a first and second view point. An image generator (205) determines a light intensity image for a third view point based on the received data. A first view transformer (207) determines first image positions and depth values in the image for vertices of the first mesh and a second view transformer (209) determines second image positions and depth values for vertices of the second mesh. A first shader (211) determines a first light intensity value and a first depth value based on the first image positions and depth value, and a second shader (213) determines a second light intensity value and a second depth value from the second image positions depth values. A combiner (215) generates an output value as a weighted combination of the first and second light intensity values where the weighting of a light intensity value increases for an increasing depth value.