Disable lighting on WorldSpace Canvas rendering.

src/Canvas2d/babylon.canvas2d.ts

@@ -69,6 +69,7 @@
             vertexData.applyToMesh(plane, false);
 
             mtl.specularColor = new Color3(0, 0, 0);
+            mtl.disableLighting =true;
             mtl.useAlphaFromDiffuseTexture = true;
             plane.position = position;
             plane.rotationQuaternion = rotation;

src/Canvas2d/babylon.group2d.ts

@@ -48,6 +48,7 @@
             }
 
             material.diffuseTexture = this._cacheTexture;
+            material.emissiveColor = new Color3(1, 1, 1);
             this._cacheTexture.hasAlpha = true;
             this._unbindCacheTarget();
         }