Proto Spline Volume

Unreal Engine 5.7 editor plugin for level design: draw spline-shaped volumes directly in the viewport and keep editing them live. Blocking, trigger, post process, nav modifier, and blockout volumes — all from one curve-editable shape, with real collision that matches what you see.

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.