Thank you Germanicus... I spend two hours to understand why my ship wasn't airtight anymore, and i saw this (a bit late, apologies) : - O2 calculation is now done on 0.5m voxels instead of 1m voxels. With that change, structures will get oxygened in much more detailed areas. Ahah, just have to re-think many of my ships one more time. Please, could you add some airtight ramps to the game ?