Import Mesh Tool

The Import Mesh Tool can be used to import external 3D mesh files (currently only .OBJ format) directly into the level. This tool does not rely on Unreal’s native mesh importers. The main utility of this tool is (1) being able to import directly as in-level geometry, like Dynamic Meshes or Volumes and (2) being able to support importing of Polygon Meshes (via Polygroups). The import process is generally also more performant than UE’s native importers, particularly if importing to a Dynamic Mesh.

The current options panel is shown to the right (improvements to come). Of particular note, the Group Mode dropdown can be set to Polygons to import polygons in the source file as polygroups in the output Dynamic or Static mesh. The Visualization Mode can be set to see the current polygroups.

Export Meshes Tool

The Export Meshes Tool can be used to export one or more mesh objects selected in the current level viewport to an external mesh file (currently only OBJ format is supported).

Various transformations can be applied on export, like switching to Y-up, Right-Handed coordinate systems and converting units. Several common presets for apps like Maya and Blender are available.

Meshes can be transformed to world space on export, and if multiple mesh actors are selected, they can be optionally merged into a single file, or exported as separate per-mesh files.

Quad/Polygon-shaped Polygroup faces can be exported to a polygonal mesh using the Faces dropdown. (Note that if the polygroups do not represent polygons, this option may produce nonsensical output…)