In reply to elliptic:
Elliptic is right. It's piles of snow created by snow cannons. They started the first ones up around the 1st of November. Despite having no snow here for 2 months 3/4 of the pistes are open with artificial snow created by the cannons, an extraordinary feat really.
On the + side its been the best season I can remember for climbing; have been climbing on the south faces nearly every day through November and December.