I've created at least one new Christmas render every year since 1998. Christmas (to me) is about traditions and in addition to creating new scenes I like to revisit some of my favorite themes from time to time.
I created the first "Blue Christmas" in 1999 using World Builder. It was extremely popular. I "faked" the tree lights using Photoshop though and that always bothered me a bit (I like everything to be done "in engine").
By 2002 I had learned Lightwave's particle system and had used it to create "Pyre" and "White Magic". I used the same techniques here to decorate my tree with blue lights. The scene is one of the rare landscapes that I rendered using Lightwave3D.
I've created a couple new versions of this scene in the years since but none has been quite so popular with my fans as this one. It is probably my signature Christmas render.