You can use your eraser, white pastel stick or pencil, OR TITANIUM WHITE ACRYLICS with a tiny paint brush to get this kind of effect. A light swift stroke of your kneaded eraser can get that ray of light effect. Those tiny accurate white lines I can get really well with acrylics. As I close, I want to say it has been a great pleasure to do this tutorial with you. Please fav, comment, and show your love here. And I will definitely reply back soon or eventually. Love, peace, happiness, success, and more beautiful days to ya! *hug* *blowkiss*