diff --git a/examples/jsm/tsl/lighting/ClusteredLightsNode.js b/examples/jsm/tsl/lighting/ClusteredLightsNode.js
index 0c7ba09c45e85a..65c281c1bd93b7 100644
--- a/examples/jsm/tsl/lighting/ClusteredLightsNode.js
+++ b/examples/jsm/tsl/lighting/ClusteredLightsNode.js
@@ -44,6 +44,7 @@ class ClusteredLightsNode extends LightsNode {
 
 		this.materialLights = [];
 		this.clusteredLights = [];
+		this._allLights = [];
 
 		this.maxLights = maxLights;
 		this.tileSize = tileSize;
@@ -205,6 +206,8 @@ class ClusteredLightsNode extends LightsNode {
 
 	setLights( lights ) {
 
+		this._allLights = lights;
+
 		const { clusteredLights, materialLights } = this;
 
 		let materialIndex = 0;
@@ -231,6 +234,12 @@ class ClusteredLightsNode extends LightsNode {
 
 	}
 
+	getLights() {
+
+		return this._allLights;
+
+	}
+
 	getBlock() {
 
 		return this._lightIndexes.element( this._screenClusterIndex.mul( int( this._chunksPerCluster ) ) );
diff --git a/src/math/Matrix4.js b/src/math/Matrix4.js
index 260d3644528ae7..985fc5b2e452b3 100644
--- a/src/math/Matrix4.js
+++ b/src/math/Matrix4.js
@@ -238,7 +238,7 @@ class Matrix4 {
 	 */
 	extractBasis( xAxis, yAxis, zAxis ) {
 
-		if ( this.determinant() === 0 ) {
+		if ( this.determinant3x3() === 0 ) {
 
 			xAxis.set( 1, 0, 0 );
 			yAxis.set( 0, 1, 0 );
@@ -288,7 +288,7 @@ class Matrix4 {
 	 */
 	extractRotation( m ) {
 
-		if ( m.determinant() === 0 ) {
+		if ( m.determinant3x3() === 0 ) {
 
 			return this.identity();
 
@@ -1080,7 +1080,7 @@ class Matrix4 {
 		position.y = te[ 13 ];
 		position.z = te[ 14 ];
 
-		const det = this.determinant();
+		const det = this.determinant3x3();
 
 		if ( det === 0 ) {