// code goes here
const outlinePass = new OutlinePass(new THREE.Vector2(this.viewport.container.offsetWidth, this.viewport.container.offsetHeight), this.viewport.scene, this.viewport.camera)
        outlinePass.visibleEdgeColor = new THREE.Color(outlineConfig.visibleEdgeColor || "#ffee00");
        outlinePass.hiddenEdgeColor = new THREE.Color(outlineConfig.hiddenEdgeColor || "#ff6a00");
        outlinePass.edgeStrength = outlineConfig.edgeStrength || Number(3.0);
        outlinePass.edgeGlow = outlineConfig.edgeGlow || Number(0.2);
        outlinePass.edgeThickness = outlineConfig.edgeThickness || Number(1.0);
        outlinePass.pulsePeriod = outlineConfig.pulsePeriod || Number(0.0);
        outlinePass.usePatternTexture = outlineConfig.usePatternTexture || false;
        outlinePass.selectedObjects = [];
        composer.addPass(outlinePass);

this.viewport.scene.overrideMaterial = new THREE.MeshNormalMaterial();