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 Sample is enough — details.
• 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 5.7, dependencies, and setup

Need help?

Questions, bug reports, and feature requests are welcome on the Proto Tools Discord.