This tutorial demonstrates how to design a simple pavilion in Grasshopper, export it from Rhino using Datasmith, and then bring it into Unreal Engine 5 to place it inside a natural environment.
No coding is required — the entire workflow is visual and accessible to beginners.
https://dev.epicgames.com/community/learning/tutorials/qpv5/from-grasshopper-to-unreal-engine-5-creating-a-simple-pavilion-and-placing-it-into-an-environment