Beni Long ago I thought about such things. There were some challenges I did not crack. I forget now. Have a look at Colour Dependant Visualization of Symbols in https://therion.speleo.sk/wiki/doku.php/metapost Bruce -----Original Message----- From: Therion [mailto:therion-bounces@speleo.sk] On Behalf Of Benedikt Hallinger Sent: Wednesday, 28 September 2016 7:39 AM To: therion@speleo.sk Subject: [Therion] Making custom metapost symbols recognize "symbol-color" thconfig command Hi there, i wonder how i can make my own custom map symbols recognize the "symbol-color" command. Maybe i also get some spare time and can adjust some of the default symbols to honor it too? Greetings, Beni _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion