Proto Spline Volume
Unreal Engine editor plugin for level design. Instead of dragging box volumes around, you just draw them — click points in the viewport and get a volume that follows your line. Every volume stays editable as a spline, so when the layout changes you grab a point and reshape it. Support for blocking, trigger, post process, nav volumes and level blockout, switchable at any time.
What you get
- One shape, five behaviours. Switch a volume's type at any time; collision, materials, and the Details panel update instantly — no need to redraw.
- Live viewport editing. Drag points, insert points on the line, extend from an end, and mix hard corners with smooth curves per point.
- Collision that matches the shape. Miters keep width even through corners, sharp corners bevel instead of spiking, and self-intersecting outlines are resolved automatically.
- Generated UVs. Walls and caps are unwrapped on every rebuild at 1 tile per metre, so a plain
Texture Sampleis enough — details. - Draw through the clutter. Hidden geometry is skipped, and whole Outliner folders can be listed for the cursor to trace through, so points land on the floor rather than on the props standing on it — Surface filtering.
- Bake when you're done. Blockout volumes convert to a Static Mesh asset with UVs, materials, and collision, in a single undo transaction.
Start here
| Getting started | Open the panel and draw your first volume |
| Volume types | What each of the five types does |
| Editing a volume | Viewport controls, point smoothing, shape settings |
| Requirements & installation | UE 5.5–5.8, dependencies, and setup |
Need help?
Questions, bug reports, and feature requests are welcome on the Proto Tools Discord.