Collision and Geometry LOD in Blender. 1 mm skin, V-HACD, DayZ Check.DayZ conversation!CDM Collider builds DayZ Geometry LOD / collision inside Blender. It is a standalone add-on — . It pairs with CDM Architect and CDM P3D Studio, and it also runs on its own. Two workflows, both documented with screenshots in the bundled handbook: Cubes / walls / simple shapes — Faces → AABB Edit Mode, select faces, press the button. You get a tight axis-aligned box with a 1 mm skin. Normals face outward (DayZ). Then Merge Exact → one Geometry object with vertex groups Component01, Component02, … Rocks / scrap / irregular props — V-HACD Method V-HACD, max 32 hulls (DayZ). Decompose splits the mesh into cyan convex hulls. Merge Hull turns them into the green Geometry LOD. CoACD with the DayZ preset is the other option. DayZ Check in the N-panel validates what the game actually wants: at most 32 components, at most 255 vertices per hull.