In some parts the camera is covered in ice. For example if you click next here you'll see the transition:
<a href="http://maps.google.com/maps?hl=en&hq=http:%2F%2Fmaps.google.com%2Fintl%2Fen%2Fhelp%2Fmaps%2Fgames10%2Fsv-alpine-skiing-map.kml&q=Whistler+Creekside&ei=va1jS8jMHZGcjAPiz-G-Cg&sll=50.094972,-122.990841&sspn=0.014317,0.032015&ie=UTF8&view=map&geocode=FXxj_AIdB0-r-A&split=0&ved=0CBMQpQY&t=h&ll=50.086611,-122.963791&spn=0,359.925585&z=14&layer=c&cbll=50.08643,-122.963797&panoid=sfci-miBHRs3ZrdI93_QKg&cbp=12,356.57,,0,6.97" rel="nofollow">http://maps.google.com/maps?hl=en&hq=http:%2F%2Fmaps.goo...</a>