Check the source mesh for broken, overlapping, disconnected, or malformed geometry. Triangles and n-gons are fine, but severely damaged topology may need cleanup before generation. You can also try Interactive Mode or Generate From Selected when automatic generation is unsuitable

Yes. Interactive Mode lets you place, connect, taper, resize, remove, and undo decals directly in the viewport. You can also generate from selected edges, use layer and texture masks, or generate along intersections and Boolean seams.

Yes. The decals are generated as editable mesh geometry. You can adjust their placement, width, material, UVs, generation settings, and other properties through the layer-based workflow.

Yes. You can export the source mesh and its decal layers as an FBX. You can also send the asset to Unreal using the optional Nanite Blueprint workflow.

The included Unreal workflow is currently documented for Unreal Engine 5.6 and 5.8.

No. You can create, edit, and render your decals entirely inside Blender. We are "faking" how a decal behave inside blender by matching the source material. Unreal Engine integration is an optional export workflow.

Automatic generation currently works on non-beveled hard edges. For a non-destructive beveled workflow, keep the source Bevel modifier unapplied and enable Add Bevel Modifier on the decal layer. The add-on will copy compatible settings from the source Bevel modifier. If the bevel is already part of the mesh topology, you can generate from a selected bevel patch in Edit Mode.

Yes. Triangles and n-gons are supported. However, generation depends on the quality of the source topology, so severely broken or malformed meshes may require cleanup.

Edge Decal Generator requires Blender 5.1 or newer.