Quote from ©orporatefilth™
Overall it's cool, it lacks detail and polish but it's still WIP so I understand. Anyway, you can put pipes where roof support should meet the wall. It's non-sense. BTW most metro tunnels doesn't need any pillars - that's why it's round, the soil load gets through the construction of the roof to the ground via the curves, no need to hold them but as you found some ref pics with that so it's fine. There COULD be such a situation, it's not usual but can be. Good luck with the level, keep up a good work!