: A top-tier class handout that walks through building box culverts and managing complex parameters. Subassembly Composer Beginner Lab Guide

Here are some top resources to help you learn Civil Design 3D Subassembly Composer:

Inside the node's "Expression" field, you would type: [See Image: IF(Surface.ElevationAtX(P2.X) < P2.Y, "Cut", "Fill")]