diff --git a/examples/renderTest.php b/examples/renderTest.php
index e725e2b..2347563 100644
--- a/examples/renderTest.php
+++ b/examples/renderTest.php
@@ -281,6 +281,8 @@ $renderEngine = new RenderEngine();
 $render .= $renderEngine;
 
 $openCL = new OpenCL();
+// $openCL->cpuUse = OpenCL::CLOSE;
+// $openCL->nativeThreadsCount = 0;
 $render .= $openCL;
 
 $lightStrategy = new LightStrategy();