Hi all :) Costmap2D seems not to "clear" the space around the robot if the laser scan range is max. This means, if you put the robot on an open field (no obstacles) it will leave *all* the space around it as *unknown*. Essentially, if Costmap sees that the scan_range=max_scan_range... it is as if it ignores it. Is there a way to configure the costmap so it wont do this? With the GMapping module it does it... Thanks and have a nice weekend Roderick de Nijs