An automatic 3D modeling system and method are described in which a 3D model may be generated from a picture or other image. Each community has a user defined permission to access a subset of the user’s data, which data is shared among some or all of the members of that community. A planarization layer covering the opaque metal pattern is formed. In one mode of operation, the output terminal is asserted when the measured temperature is greater than the upper limit value and deasserted when the measured temperature goes below a lower limit value.