Basically a shield that when active works as a physical barrier, (i.e stopping creatures from moving past it and having collision with the terrain) but doesn't impede hostile weapons .
It would be helpful for planets with a lot of asteroid strikes or when maneuvering at speed through terrain, and perhaps even hold off the direct effect of lava damage (though heat would still bleed through the shield.
To keep game balance it should also not be able to be powered up at the same time as the normal shield.
