{
// twirl filter
TwirlFilter tf = new TwirlFilter();
float angle = this.twirlAspect;
tf.setAngle( angle );
tf.filter(renderedImage, renderedImage);
// Marble Filter
MarbleFilter mf = new MarbleFilter();
mf.setXScale( this.marbleXScale );
mf.setYScale( this.marbleYScale );