Make your next creation.
Turn your ideas into 3D assets. Start creating with Hyper3D.
A self-running model railway simulation with at least three trains on shared tracks. Trains autonomously operate junctions and signals to prevent collisions, with all visual design decisions left to the model. The author states this exact prompt was given to both Fable 5.1 and GPT-6 Astra.
State which objects must remain separate, named and editable; otherwise a visually convincing shell may still be unusable.
Ask the model to run the scene, inspect visible failures and repeat until concrete frame-rate, interaction and layout checks pass.
For large worlds, split the work into districts, assemblies or milestones and approve each section before expanding scope.