ShapeBrush sel = (ShapeBrush) brushes.getSelectedBrush();
sel.setSize((Integer) brushSize.getValue());
if (cbRandomBrush.isSelected()) {
RandomBrush randomBrush = new RandomBrush(sel);
randomBrush.setRatio(sRandomAmount.getValue() / (double) sRandomAmount.getMaximum());
myBrush = randomBrush;
} else {
myBrush = new ShapeBrush(sel);
}