I have used three different papers to fill my tree shape and then stuck some tiny white snowflakes on the front. I began at the outside edge and followed the instruction in the magazine to build up the layers in ever decreasing triangles until I had a tiny hole in the middle which is backed with silver paper.
The silver outlining is already on the card, which is a bonus as I'm not sure I could be that accurate. I have made several of this style before in different colours, it's a firm favourite with the family.
I can't post the full instructions due to copyright but I can give you the web address for Craft Creations, www.craftcreations.com. The instructions are in Issue 47 from Autumn 2007. They may have back issues that you can either purchase or access on the web.
I would like to enter this card in the following challenges:
CraftyHazelnut's Christmas Challenge Extra - Anything Christmas
Sparkles Christmas Challenges - Christmas Trees