var newDecal = BABYLON.Mesh.CreateDecal("decal", mesh, decalPosition, normal, decalSize, angle);

BABYLON.SceneLoader.ImportMesh("Shcroendiger'scat", "scenes/", "SSAOcat.babylon", scene, function (newMeshes) {
   var cat = newMeshes[0]; / /this is mesh shown on the screen.

   // Set the target of the camera to the first imported mesh
   camera.target = cat;

   var decalMaterial = new BABYLON.StandardMaterial("decalMat", scene);
   decalMaterial.diffuseTexture = new BABYLON.Texture("images/impact1.jpg", scene);
   decalMaterial.diffuseTexture.hasAlpha = true;
   decalMaterial.zOffset = -2;

   var onPointerDown = function (evt) {
      if (evt.button !== 0) {
         return;
      }

      // check if we are under a mesh
      var pickInfo = scene.pick(scene.pointerX, scene.pointerY, function (mesh) { return mesh === cat; 
      // this will give all the meshes , but it will pick the mesh whch is same as cat and return true if it is found });
      if (pickInfo.hit) { // if true
         var decalSize = new BABYLON.Vector3(5, 5, 5); //size of decal is defined

         var newDecal = BABYLON.Mesh.CreateDecal("decal", cat, pickInfo.pickedPoint, pickInfo.getNormal(true), decalSize); //decal is created 
         newDecal.material = decalMaterial; //decal material is added.
      }
   }
   var canvas = engine.getRenderingCanvas();
   canvas.addEventListener("pointerdown", onPointerDown, false);

   scene.onDispose = function () {
      canvas.removeEventListener("pointerdown", onPointerDown);
   }
});