Open the editable source in Blender 5.0.1, or use the export blend for fixed triangulation. Textures are packed into both Blender files and also included as PNGs. FBX/OBJ importers may require explicit material reconnection: BaseColor sRGB, Metallic/Roughness/Normal linear, tangent normal map with OpenGL orientation. Preserve the export/textures sibling folders for MTL relative paths. UVs use a shared 2K atlas with no intentional overlap. Pivot is floor-centered; source axes are +Z up / -Y front, units meters. No rig, animations or LODs. Engine-specific documentation describes native Unity/Unreal delivery and its exact verified versions. Preview studio objects are not sold as extra models. Import instructions are supplied in IMPORT_GUIDE.md. No other Blender or engine versions have been verified.