A method for rendering a shadow in a 3 D scene includes generating a penumbra map using a z-buffer and generating an occluder map using the z-buffer. Prediction pixels of the prediction block is generated using an interpolation filter selected based on the motion vector. A PLL system may also implement this automatic calibration method. Control means are provided for selectively rendering one or the other of said filters operable to allow the provision of a receiver with selective variable resolution bandwidth and to allow the selective dual up down conversion. This is made possible by the specific construction of the matrix sensor. Furthermore, the resist component in this bump resist pattern is removed, thereby forming a micro bump 8 consisting of the micro metallic powder on the substrate.