by Skava·Modeling
Images © Skava. Used for product review; image policy.
ProtoBlock earns its place in the superhive library by pulling primitives, grid snapping, booleans, kit pieces, and engine-ready FBX export into one Blender sidebar aimed at level blockout.
ProtoBlock is a Blender add-on built for snap-to-grid level blockout, collapsing common grayboxing steps into a single sidebar. It gives level designers eight primitives tuned for the job — cube, cylinder, wall, pillar, ramp, floor, arch, and stairs — that drop onto the grid, with backup and restore of your existing snap settings.
Beyond placing shapes, ProtoBlock handles CSG booleans with Union, Difference, and Intersect operations that auto-apply, and lets you save and load reusable modular kit pieces from a dedicated collection. Auto box-UV keeps tiling textures clean on grayboxed walls, and per-object materials mean cycling colors does not recolour everything at once.
When the layout is ready, ProtoBlock exports to FBX with placeholder bbox collision, described as ready for Unity, Unreal, and Godot. It supports Blender 3.2 and later on Windows, macOS, and Linux, ships as Python only with no DLL, and includes a README with a full quick-start guide. Updates across the v1.x line are free.
Protoblock is best for level designers and game developers grayboxing or blocking out environments in Blender who need to export to Unity, Unreal, or Godot.
Protoblock is completely free to download and use.
ProtoBlock supports Blender 3.2 and later, including the 4.x series, with a listed version range spanning Blender 3.2 through 5.2. It runs on Windows, macOS, and Linux, so the add-on isn't tied to one platform. The render engines noted for it are Cycles and Eevee. Once installed, its sidebar tab appears in the 3D Viewport, which you open by pressing N. If you work across several Blender machines or a mix of operating systems, the same add-on covers all of them.
ProtoBlock exports to FBX with placeholder bbox collision, and the format is described as Unity, Unreal, and Godot ready. That means the blockout geometry you build in Blender can move into those engines through the FBX file. The collision is a placeholder bounding box generated on export. For the exact export options and setup steps, the developer's page and the included README quick-start guide cover the details.
ProtoBlock installs like a standard Blender add-on. Open Edit, then Preferences, then Add-ons, choose Install, pick the protoblock_v1_0_0.zip file, and enable it. After enabling, the ProtoBlock sidebar tab shows up in the 3D Viewport, which you reveal by pressing N. The add-on is Python only with no DLL, and it ships with a README containing a full quick-start guide. Support is handled through marketplace messaging, and free updates are provided across the v1.x line.
ProtoBlock is listed as free here, so check the developer's page for current licensing. The add-on is released under GPL-3.0, the standard for Blender add-ons, and that licence applies to the add-on code only. Levels you build with ProtoBlock remain yours to ship in any commercial project. Updates across the v1.x line are provided free, and questions go through marketplace messaging. For the most up-to-date terms, the developer's page is the place to confirm.
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