I have a point feature class with three elevation value fields (High; Medium; Low - calculated from a previous process), which I need to use as inputs in Raster Calculator, with the following expression: "DEM" <= Low elevation value in point FC above. This calculation needs to be repeated for each elevation value (i.e. High; Medium; Low). Question: How can I input these field values into the Raster Calculator in ModelBuilder? The Help File mentions using Variables, but I don't know how to do this! Any guidance will be gratefully received. Thanks very much.