This kit let's you easily build a tunnel level.
Parts snap perfectly using vertex-snap. Bends etc. are bended in a 45 degree angle, so rotate accordingly to get a clean snap.
Contains all the necessary parts for an underground scene:
Straight pieces x3 (including one with an alcove for service door exit),
bending piece and two different intersection pieces. Also includes a service entrance you can use as a sensible trigger to load an underground scene from your other levels. You can create dead ends quickly by using the rubble plane.
Everything is prefabbed. Also prefabs for empty tunels and for rails only. Just in case you need those.
Most polygon heavy piece, the intersection, comes with 3252 verts (all rails, lamps etc. included). Everything else is way below that.
All texture maps come with a specular and a normal map.
The example level is a bit crazy with the lights! Have fun!