Nice update, this touches a lot of core systems at once.
If I was testing this build, I’d focus on:
- fluid simulation behaviour after the rework (flow consistency, edge cases, draining systems)
- train collisions and signalling logic, especially with manual driving + automation together
- blueprint save/load across sessions to make sure builds persist correctly
- multiplayer behaviour after the performance changes (desync or state mismatches)
- interaction range reduction and how it affects existing player setups
The fluid simulation and multiplayer changes feel like the highest-risk areas, since they tend to introduce subtle issues that don’t show up immediately.