This implements base ambient lighting for tiles which helps with tiles like lava and ceiling lights.

gui/fsm.cpp

@@ -318,6 +318,7 @@ namespace gui {
             break;
           case KEY::P:
             sound::mute(false);
+            if(!sound::playing("ambient_1")) sound::play("ambient_1", true);
             $debug_ui.debug();
             shaders::reload();
             dbc::log("save map!");