Patches + updates Map, Civil 3D, Raster, InfraWorks, Vehicle 87MB 2871× 30.08.2017 Autodesk River and Flood Analysis Module for AutoCAD Civil 3D 2018, HEC-RAS (Subscription) LINK External link β opens in a new browser window. The Autodesk server may require users to log in separately (with their Autodesk ID). Open Link ▶ β Close