This code in ViewPainter can cause the scene to be rendered multiple times:


            for (int i = 0; i < dirtyRegionContainer.size(); i++) {

// <snipped>

                    // Disable occlusion culling if depth buffer is enabled for the scene.
                    if (sceneState.getScene().getDepthBuffer()) {
                        doPaint(g, null);
                    } else {
                        doPaint(g, root.getRenderRoot(NODE_PATH, dirtyRegion, i, tx, projTx));
                        NODE_PATH.clear();
                    }
                }
            }

The line doPaint(g, null) should never be called more than once in ViewPainter. The check for getDepthBuffer() can be made once, outside the for loop.