The shape
This study uses a continuous ribbon to describe an open volume. The helix widens through the middle and narrows at the top and bottom.
In Houdini
A Sweep node carries the ribbon along the helix. The ribbon also twists along its path, and a PolyExtrude node gives it thickness.
In Unreal
The geometry was exported as FBX and placed in a test scene. The still above shows the result on a plinth, with its cast shadow.
Part of the procedural sculpture gallery: twelve studies built through an AI-controlled Houdini-to-Unreal workflow. The agent constructed the geometry; this note documents the resulting shape and process.