diff --git a/examples/3dtiles.html b/examples/3dtiles.html
index f9c0cfc4f1..475e272625 100644
--- a/examples/3dtiles.html
+++ b/examples/3dtiles.html
@@ -130,7 +130,7 @@
             $3dTilesLayerRequestVolume.overrideMaterials = true;  // custom cesium shaders are not functional
             $3dTilesLayerRequestVolume.type = 'geometry';
             $3dTilesLayerRequestVolume.visible = true;
-            $3dTilesLayerRequestVolume.sseThreshold = 1;            
+            $3dTilesLayerRequestVolume.sseThreshold = 1;
             // add an event for have information when you move your mouse on a building
             itowns.View.prototype.addLayer.call(globe, $3dTilesLayerRequestVolume).then(function _() { window.addEventListener('mousemove', picking, false); })
 
diff --git a/src/Core/Scheduler/Providers/3dTiles_Provider.js b/src/Core/Scheduler/Providers/3dTiles_Provider.js
index 03568095d4..ddf30ab820 100644
--- a/src/Core/Scheduler/Providers/3dTiles_Provider.js
+++ b/src/Core/Scheduler/Providers/3dTiles_Provider.js
@@ -166,7 +166,11 @@ function configureTile(tile, layer, metadata, parent) {
     tile.applyMatrix(tile.transform);
     tile.geometricError = metadata.geometricError;
     tile.tileId = metadata.tileId;
-    tile.additiveRefinement = (metadata.refine === 'add');
+    if (metadata.refine) {
+        tile.additiveRefinement = (metadata.refine.toUpperCase() === 'ADD');
+    } else {
+        tile.additiveRefinement = parent ? (parent.additiveRefinement) : false;
+    }
     tile.parentFromLocalTransform = tile.transform;
     tile.worldFromLocalTransform = new THREE.Matrix4().multiplyMatrices(parent ? parent.worldFromLocalTransform : new THREE.Matrix4(), tile.parentFromLocalTransform);
     const m = new THREE.Matrix4();
@@ -177,6 +181,7 @@ function configureTile(tile, layer, metadata, parent) {
         tile.add(tile.boundingVolume.region);
     }
     tile.updateMatrixWorld();
+    console.log(parent);
 }
 
 const textDecoder = new TextDecoder('utf-8');
diff --git a/src/Process/3dTilesProcessing.js b/src/Process/3dTilesProcessing.js
index 999af8c026..f61b214278 100644
--- a/src/Process/3dTilesProcessing.js
+++ b/src/Process/3dTilesProcessing.js
@@ -167,7 +167,6 @@ export function process3dTilesNode(cullingTest, subdivisionTest) {
                     n.visible = false;
                 }
             }
-
             return returnValue;
         }