PI + 0.1) // a hack
            this.man.add(man)
            this.man.rotation.set(0, Math.PI * 1.5, 0)
            this.man.position.set(35, 0, 0)
            // add shadow
            this.man.traverse(child => {
              if (child.isMesh) {
                child.castShadow = child.receiveShadow = false
                // https://discourse.threejs.org/t/cant-export-material-from-blender-gltf/12258
                child.material.roughness = 1
                child.material.metalness = 0
             