Fix line helpers

src/three/widgets/CameraHelper2.ts

         const geometry = new LineSegmentsGeometry()
         const material = new LineMaterial2({
             color: 0xffffff,
-            linewidth: 0.005, // in world units with size attenuation, pixels otherwise
+            linewidth: 5, // in world units with size attenuation, pixels otherwise
             vertexColors: true,
+            worldUnits: false,
 
             dashed: false,
             alphaToCoverage: true,

src/three/widgets/DirectionalLightHelper2.ts

 
         this.material = new LineMaterial2({
             color: 0xff0000,
-            linewidth: 0.005, // in world units with size attenuation, pixels otherwise
+            linewidth: 5, // in world units with size attenuation, pixels otherwise
             vertexColors: false,
+            worldUnits: false,
 
             dashed: false,
             alphaToCoverage: true,
         this.lightPlane.material = this.material
         this.targetLine.material = this.material
         this.material.color.set(this.color ?? this.light.color)
-        this.material.linewidth = this.lineWidth * 0.001
+        this.material.linewidth = this.lineWidth
 
         this.targetLine.lookAt(this._v2)
         this.targetLine.scale.z = this.light.intensity / 3.

src/three/widgets/PointLightHelper2.ts

 
         this.material = new LineMaterial2({
             color: 0xff0000,
-            linewidth: 0.005, // in world units with size attenuation, pixels otherwise
+            linewidth: 5, // in world units with size attenuation, pixels otherwise
             vertexColors: false,
+            worldUnits: false,
 
             dashed: false,
             alphaToCoverage: true,
         if (!this.light || !this.lightSphere) return
 
         this.material.color.set(this.color ?? this.light.color)
-        this.material.linewidth = this.lineWidth * 0.001
+        this.material.linewidth = this.lineWidth
         this.lightSphere.scale.setScalar(this.size)
 
         super.update()

src/three/widgets/SpotLightHelper2.ts

 
         this.material = new LineMaterial2({
             color: 0xff0000,
-            linewidth: 0.005, // in world units with size attenuation, pixels otherwise
+            linewidth: 5, // in world units with size attenuation, pixels otherwise
             vertexColors: false,
+            worldUnits: false,
 
             dashed: false,
             alphaToCoverage: true,
         this.cone.lookAt(this._v1)
 
         this.material.color.set(this.color ?? this.light.color)
-        this.material.linewidth = this.lineWidth * 0.001
+        this.material.linewidth = this.lineWidth
 
         super.update()
     }