Mesh Tool is an mesh editor for Unreal Engine. It allows you to edit mesh assets and prototype props and levels without leaving Unreal Editor.
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Technical Details​

Highlight of Features:​

Select & Transform

• Vertex/Edge/Face/Quad/Object Mode
• Select/Translate/Rotate/Scale elements
• Vertex Snap
• Delta Transform
• Marquee Select
• Convert Selection between Vertex/Edge/Face
• Show/Hide Transform Widget
• Customizable Transform Widget Pivot

Vertex Op

• Create Face from Selected Vertices
• Collapse/Weld Vertices
• Align Vertices
• Set as Ruler

Edge Op

• Split/Turn/Bridge/Extrude Edges
• Insert Edge Loop

Face Op

• Slab Transform
• Draw Quad/Circle/Box on Customizable Draw Plane
• Flip Faces Normal
• Extrude/Inset/Duplicate/Separate Faces
• Assign Material to Individual Faces
• Flatten Faces / Plane Cut/ Mirror Faces

Texture Map (UV) Op

• Planar or Box Mapping
• Pan/Rotate/Scale/Flip UV
• Match UV / Flow UV

Object Op

• Flip All /Weld All Vertices
• Hide/Show Other Actors
• Recompute Normal
• Insert Primitive
• Auto UV / Auto Smooth

Mesh Op

• Save/Duplicate/Browse to Current Editing Static Mesh

Modules:
- MeshTool (Editor)
Important/Additional Notes:
- Full c++ source code included, works with both Luancher and Github builds
- Works with both C++ and Blueprint only projects
- Supported Development Platforms: Windows (Prebuilt Binary for Mac but not tested)