Tunnel Air Shaft
Tunnel Air Shaft Asset.
Available: Always
Most UK railway tunnels have ventilation shafts. In additional to their operation as smoke extraction and pressure relief, they served important roles in the construction process.
Just for decoration. Manually placed above tunnels.
Choice of 4 materials for the base. All credit for the material textures to Urban Games.
Update: Added 3 other materials (now in 4 total).
