set tile source type property so it gets propagated to worker
set tile source type property so it gets propagated to worker

DHaylock/tangram,zerebubuth/tangram,taylorhxu/tangram,TitoAgudelo/tangram,xvilan/tangram,xvilan/tangram,tangrams/tangram,ceseale/tangram,rosamcgee/tangram,tangrams/tangram,ceseale/tangram,TitoAgudelo/tangram,rosamcgee/tangram,taylorhxu/tangram,zerebubuth/tangram,zerebubuth/tangram,ceseale/tangram,xvilan/tangram,DHaylock/tangram,taylorhxu/tangram,DHaylock/tangram,rosamcgee/tangram,TitoAgudelo/tangram