Ensemble8 - 3D Cubes

A lot of exceptions on console:
java.lang.ClassCastException: com.sun.javafx.geom.BoxBounds cannot be cast to com.sun.javafx.geom.RectBounds
        at com.sun.scenario.effect.DisplacementMap.getDirtyRegions(DisplacementMap.java:354)
        at com.sun.javafx.sg.BaseNode.applyEffect(BaseNode.java:1322)
        at com.sun.javafx.sg.BaseNode.accumulateGroupDirtyRegion(BaseNode.java:1091)
        at com.sun.javafx.sg.BaseNode.accumulateDirtyRegions(BaseNode.java:913)
        at com.sun.javafx.sg.BaseNode.accumulateGroupDirtyRegion(BaseNode.java:1082)
        at com.sun.javafx.sg.BaseNode.accumulateDirtyRegions(BaseNode.java:913)
        at com.sun.javafx.sg.BaseNode.accumulateGroupDirtyRegion(BaseNode.java:1082)
        at com.sun.javafx.sg.BaseNode.accumulateDirtyRegions(BaseNode.java:913)
        at com.sun.javafx.sg.BaseNode.accumulateGroupDirtyRegion(BaseNode.java:1082)
        at com.sun.javafx.sg.BaseNode.accumulateDirtyRegions(BaseNode.java:913)
        at com.sun.javafx.sg.BaseNode.accumulateGroupDirtyRegion(BaseNode.java:1082)
        at com.sun.javafx.sg.BaseNode.accumulateDirtyRegions(BaseNode.java:913)
        at com.sun.javafx.tk.quantum.AbstractPainter.setDirtyRect(AbstractPainter.java:162)
        at com.sun.javafx.tk.quantum.AbstractPainter.paintImpl(AbstractPainter.java:175)
        at com.sun.javafx.tk.quantum.PresentingPainter.run(PresentingPainter.java:92)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
        at com.sun.prism.render.RenderJob.run(RenderJob.java:56)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:131)
        at java.lang.Thread.run(Thread.java:722)