EdgeGeometry Issue after CSG Union operations

[yesbird]

I had the similar issue and increasing subdivision was the cure, then I switched to Manifold to increase performance, details are here:

Unwanted edge in CSG result

I am trying to apply wireframe on result of CSG subtract operation, library is THREE-CSGMesh by @manthrax (btw, many thanks for this port). Doing it this way I am getting strange artifact (please see attached image). wireframe = new THREE.LineSegments( new THREE.EdgesGeometry( mesh.geometry, 1 ), new THREE.LineBasicMaterial( { color: 0x888888, linewidth: 2 } ) ); scene.add(wireframe); [image] Examining this mesh in console I found nothing special, so I am completely sta…