Someone made a 3D boating simulation using Finnish island geodata; called StormWinds and using Dyalog APL connecting to DirectX - https://www.dyalog.com/case-studies/simulation.htm

The author also has this video: https://dyalog.tv/APLSeeds21/?v=iC9floP7POU "Tomas takes you through the API of a 3D-engine and shows you how to connect to it from APL, enabling you to create a simple scene with graphics objects moving in real-time. He also explores some of the more advanced rendering techniques." (I haven't watched it)