Procedural Railroad

A Houdini HDA (used in UE5 with Houdini Engine) that takes a single curve input, applies slope reduction, and conforms a procedurally modelled railroad to the underlying terrain.

In UE5 I used a PDG network for creating the terrain and applying the railroad HDA to it afterward.

The extra UE5 visuals (materials, grass, rocks, etc.) come from Megascans.