A position detection system, comprising: a two-dimensional detection area, wherein the position detection system is configured to detect an existence and a location of an object within the two-dimensional detection area; at least one source (110; 112) of electromagnetic radiation for outputting an electromagnetic radiation over at least a portion of the detection area; a prismatic film positioned along at least a portion of a periphery of the detection area, wherein the prismatic film is positioned with respect to the at least one source (110; 112) so that it retroreflects towards the source(s) the electromagnetic radiation directed by the respective source(s) towards the prismatic film, the prismatic film comprising: a retroreflective substrate including a plurality of triangular cube corner retroreflective elements and a metallized layer disposed over at least a portion of the retroreflective substrate, wherein base edges of the cube corner retroreflective elements are linear and in a common plane perpendicular to the detection area, and wherein each cube corner retroreflective element forms an isosceles triangle cube shape with two of the base edges being approximately the same length, wherein the cube corner retroreflective elements have a cant in a range of 8 to 35 degrees in a direction, such that only one cube face is more parallel to a reflector front surface of the prismatic film than any face of an uncanted cube, and a cube depth between 25.4 and 304.8 micrometers (0.001 and 0.012 inches) in relation to the common plane, and wherein a cube axis is defined as a central axis that is a trisector of an internal space defined by the three intersection faces of the respective cube corner element and wherein said cant is measured as an angle between the cube axis and a sheeting surface normal of the reflector front surface of the prismatic film, and wherein the cube corner retroreflective elements are joined together in one or more tiles all having the same cube corner orientation; and a camera (117; 118) positioned to receive electromagnetic radiation reflected from the prismatic film. a two-dimensional detection area, wherein the position detection system is configured to detect an existence and a location of an object within the two-dimensional detection area; at least one source (110; 112) of electromagnetic radiation for outputting an electromagnetic radiation over at least a portion of the detection area; a prismatic film positioned along at least a portion of a periphery of the detection area, wherein the prismatic film is positioned with respect to the at least one source (110; 112) so that it retroreflects towards the source(s) the electromagnetic radiation directed by the respective source(s) towards the prismatic film, the prismatic film comprising: a retroreflective substrate including a plurality of triangular cube corner retroreflective elements and a metallized layer disposed over at least a portion of the retroreflective substrate, wherein base edges of the cube corner retroreflective elements are linear and in a common plane perpendicular to the detection area, and wherein each cube corner retroreflective element forms an isosceles triangle cube shape with two of the base edges being approximately the same length, wherein the cube corner retroreflective elements have a cant in a range of 8 to 35 degrees in a direction, such that only one cube face is more parallel to a reflector front surface of the prismatic film than any face of an uncanted cube, and a cube depth between 25.4 and 304.8 micrometers (0.001 and 0.012 inches) in relation to the common plane, and wherein a cube axis is defined as a central axis that is a trisector of an internal space defined by the three intersection faces of the respective cube corner element and wherein said cant is measured as an angle between the cube axis and a sheeting surface normal of the reflector front surface of the prismatic film, and wherein the cube corner retroreflective elements are joined together in one or more tiles all having the same cube corner orientation; and a retroreflective substrate including a plurality of triangular cube corner retroreflective elements and a metallized layer disposed over at least a portion of the retroreflective substrate, wherein base edges of the cube corner retroreflective elements are linear and in a common plane perpendicular to the detection area, and wherein each cube corner retroreflective element forms an isosceles triangle cube shape with two of the base edges being approximately the same length, wherein the cube corner retroreflective elements have a cant in a range of 8 to 35 degrees in a direction, such that only one cube face is more parallel to a reflector front surface of the prismatic film than any face of an uncanted cube, and a cube depth between 25.4 and 304.8 micrometers (0.001 and 0.012 inches) in relation to the common plane, and wherein a cube axis is defined as a central axis that is a trisector of an internal space defined by the three intersection faces of the respective cube corner element and wherein said cant is measured as an angle between the cube axis and a sheeting surface normal of the reflector front surface of the prismatic film, and wherein the cube corner retroreflective elements are joined together in one or more tiles all having the same cube corner orientation; and a camera (117; 118) positioned to receive electromagnetic radiation reflected from the prismatic film.