I have this:
$FC->defineStyle("shadow_1","shadow", "angle=90;color=000000;alpha=100;blurX=0;blurY=0;strength=2");
$FC->defineStyle("shadow_2", "shadow", "angle=130;color=000000;alpha=100;blurX=0;blurY=0;strength=2");
$FC->applyStyle("CANVAS","shadow_1");
$FC->applyStyle("CANVAS","shadow_2");
But it does nothing from what I can see.