Lol, this is great! Santa’s so late that he’s delivering in the daytime!
I think that the materials are ok, but the lighting could use some work. At the moment, the light is casting fairly long shadows, so I assume that it’s morning. However, the color of the light and shadows doesn’t make is look like morning. If it’s near noon, I think that the color of the lights is alright, but they need to be pointing almost straight down. You might also make the lights a bit more blueish so that the image is more frosty and feels cold.
That’s just my amateur opinion, however.
Fantastic work! Can’t wait to see more.