diff --git a/src/base/TilesRendererBase.js b/src/base/TilesRendererBase.js
index 5ca4b3f6c..be097268e 100644
--- a/src/base/TilesRendererBase.js
+++ b/src/base/TilesRendererBase.js
@@ -135,6 +135,7 @@ export class TilesRendererBase {
 		parseQueue.maxJobs = 1;
 		parseQueue.priorityCallback = priorityCallback;
 
+		this.usedSet = new Set();
 		this.lruCache = lruCache;
 		this.downloadQueue = downloadQueue;
 		this.parseQueue = parseQueue;
@@ -245,11 +246,17 @@ export class TilesRendererBase {
 
 	}
 
+	markTileUsed( tile ) {
+
+		this.usedSet.add( tile );
+		this.lruCache.add( tile );
+
+	}
+
 	// Public API
 	update() {
 
-		const stats = this.stats;
-		const lruCache = this.lruCache;
+		const { lruCache, usedSet, stats, root } = this;
 		if ( this.rootLoadingState === UNLOADED ) {
 
 			this.rootLoadingState = LOADING;
@@ -264,20 +271,21 @@ export class TilesRendererBase {
 
 		}
 
-		if ( ! this.root ) {
+		if ( ! root ) {
 
 			return;
 
 		}
 
-		const root = this.root;
-
 		stats.inFrustum = 0;
 		stats.used = 0;
 		stats.active = 0;
 		stats.visible = 0;
 		this.frameCount ++;
 
+		usedSet.forEach( tile => lruCache.markUnused( tile ) );
+		usedSet.clear();
+
 		markUsedTiles( root, this );
 		markUsedSetLeaves( root, this );
 		markVisibleTiles( root, this );
diff --git a/src/base/traverseFunctions.js b/src/base/traverseFunctions.js
index 29c3ee53a..79338c13d 100644
--- a/src/base/traverseFunctions.js
+++ b/src/base/traverseFunctions.js
@@ -102,7 +102,7 @@ function markUsed( tile, renderer ) {
 	}
 
 	tile.__used = true;
-	renderer.lruCache.markUsed( tile );
+	tile.markTileUsed( tile );
 	renderer.stats.used ++;
 
 	if ( tile.__inFrustum === true ) {
diff --git a/src/plugins/three/UnloadTilesPlugin.js b/src/plugins/three/UnloadTilesPlugin.js
index 3060a5a34..7702f0338 100644
--- a/src/plugins/three/UnloadTilesPlugin.js
+++ b/src/plugins/three/UnloadTilesPlugin.js
@@ -97,7 +97,7 @@ export class UnloadTilesPlugin {
 			if ( visible ) {
 
 				lruCache.add( tile, unloadCallback );
-				lruCache.markUsed( tile );
+				tiles.markTileUsed( tile );
 				deferCallbacks.cancel( tile );
 
 			} else {
diff --git a/src/plugins/three/fade/TilesFadePlugin.js b/src/plugins/three/fade/TilesFadePlugin.js
index 05863bef7..649b7802f 100644
--- a/src/plugins/three/fade/TilesFadePlugin.js
+++ b/src/plugins/three/fade/TilesFadePlugin.js
@@ -34,7 +34,7 @@ function onUpdateAfter() {
 	const fadingBefore = this._fadingBefore;
 	const prevCameraTransforms = this._prevCameraTransforms;
 	const { tiles, maximumFadeOutTiles, batchedMesh } = this;
-	const { lruCache, cameras } = tiles;
+	const { cameras } = tiles;
 
 	// reset the active tiles flag
 	tiles.displayActiveTiles = displayActiveTiles;
@@ -126,7 +126,7 @@ function onUpdateAfter() {
 		// prevent faded tiles from being unloaded
 		const scene = tile.cached.scene;
 		const isFadingOut = fadeManager.isFadingOut( tile );
-		lruCache.markUsed( tile );
+		tiles.markTileUsed( tile );
 		if ( scene ) {
 
 			fadeMaterialManager.setFade( scene, fadeIn, fadeOut );
diff --git a/src/three/TilesRenderer.js b/src/three/TilesRenderer.js
index 6759dabaa..237e6b752 100644
--- a/src/three/TilesRenderer.js
+++ b/src/three/TilesRenderer.js
@@ -337,7 +337,7 @@ export class TilesRenderer extends TilesRendererBase {
 			.then( () => {
 
 				// cache the gltf tile set rotation matrix
-				const { asset, extensions } = this.rootTileSet;
+				const { asset, extensions = {} } = this.rootTileSet;
 				const upAxis = asset && asset.gltfUpAxis || 'y';
 				switch ( upAxis.toLowerCase() ) {
 
diff --git a/src/utilities/LRUCache.js b/src/utilities/LRUCache.js
index 878e05233..f84e13065 100644
--- a/src/utilities/LRUCache.js
+++ b/src/utilities/LRUCache.js
@@ -49,7 +49,6 @@ class LRUCache {
 		this.itemList = [];
 		this.usedSet = new Set();
 		this.callbacks = new Map();
-		this.markUnusedQueued = false;
 		this.unloadingHandle = - 1;
 		this.cachedBytes = 0;
 		this.bytesMap = new Map();
@@ -78,12 +77,6 @@ class LRUCache {
 
 	add( item, removeCb ) {
 
-		if ( this.markUnusedQueued ) {
-
-			this.markAllUnused();
-
-		}
-
 		const itemSet = this.itemSet;
 		if ( itemSet.has( item ) ) {
 
@@ -194,12 +187,6 @@ class LRUCache {
 
 	markUsed( item ) {
 
-		if ( this.markUnusedQueued ) {
-
-			this.markAllUnused();
-
-		}
-
 		const itemSet = this.itemSet;
 		const usedSet = this.usedSet;
 		if ( itemSet.has( item ) && ! usedSet.has( item ) ) {
@@ -213,25 +200,13 @@ class LRUCache {
 
 	markUnused( item ) {
 
-		const usedSet = this.usedSet;
-		if ( usedSet.has( item ) ) {
-
-			usedSet.delete( item );
-
-		}
+		this.usedSet.delete( item );
 
 	}
 
 	markAllUnused() {
 
 		this.usedSet.clear();
-		this.markUnusedQueued = false;
-		if ( this.unloadingHandle !== - 1 ) {
-
-			cancelAnimationFrame( this.unloadingHandle );
-			this.unloadingHandle = - 1;
-
-		}
 
 	}
 
@@ -383,6 +358,8 @@ class LRUCache {
 
 	scheduleUnload() {
 
+		cancelAnimationFrame( this.unloadingHandle );
+
 		if ( ! this.scheduled ) {
 
 			this.scheduled = true;
@@ -391,12 +368,6 @@ class LRUCache {
 				this.scheduled = false;
 				this.unloadUnusedContent();
 
-				if ( this.autoMarkUnused ) {
-
-					this.markUnusedQueued = true;
-
-				}
-
 			} );
 
 		}