Orthographic unproject

[Mugen87]

Have you tried it like demonstrated here:

How to unproject mouse2D with Orthographic Camera

Try this: const vector = new THREE.Vector3(); vector.set( mouse.x, mouse.y, ( camera.near + camera.far ) / ( camera.near - camera.far ) ); vector.unproject( camera ); BTW: You do not project. You unproject^^.