Hi Matthieu,
Hope you have been well. Have always been a fan of rtabmap since the beginning, and have still been experimenting on it as much as I can.
In my gazebo simulation, I noticed some free cells that is often mapped beyond the walls in my simulation, as seen below. Is there a way to modify certain params such that there's no free cells behind the walls (I understand that this isn't realistic in the real world). I am using a 3D lidar for localization and mapping.
![](http://official-rtab-map-forum.206.s1.nabble.com/file/n9580/white_cells_beyond_wall.png)
This is an example of no free cells beyond obstacles:
![](http://official-rtab-map-forum.206.s1.nabble.com/file/n9580/no_free_cell_beyond_wall.jpg)
Much thanks,
Derek Tan