diff --git a/lib/torque/renderer/ball.js b/lib/torque/renderer/ball.js
index 3e216e2..86dbde2 100644
--- a/lib/torque/renderer/ball.js
+++ b/lib/torque/renderer/ball.js
@@ -115,10 +115,7 @@ BallRenderer.prototype = {
 
 	},
 	invalidate: function(){
-		if(!this.imageData) this.imageData = this.ctx.createImageData(this.width, this.height);
-		this.pointList = new Uint8ClampedArray(this.size * 4);
-	    this.imageData.data.set(this.pointList);
-	    this.ctx.putImageData(this.imageData, 0, 0);
+		this.pointLayer = this.contourLayer = this.isoplethLayer = new Uint8ClampedArray(this.size * 4);
 	},
 	getRIndexPos: function(x,y){
 		var rIndexPos = (y*this.width+x)*4;