Updated, I need a aecosim BIM model a 900meter rail tunnels that is curved with a few junctions using AECOSIM only .Need to be done in less than 1 month. Existing model is a MESH dgn [login to view URL] to convert to smart solid. Walls and slabs are curved and varying slope for rail [login to view URL] at the pictures .model need to be updated with cad drawings