Someone posted a great link to the Pamps webcams but I think we may be being scammed a bit - if you look at the Studenets pics throughout the day they are identical today from yesterday + seem to be a random collection of individual shots with ramps + other structures appearing and then disappearing in adjacent time slots!
I can promise you your not being scammed. Now and again the cams go off for a day and the day befores shots run instead! Sometimes it just happens
The ramps apearing on the wall are mounds of snow being made by the snow cannons - this then gets pushed off all over the wall to keep the base in good nic
I can vouch for them as have been on em quite a few times :-)
If you look at today's pics the ramp that suddenly appears is one which has clearly been constructed as a jump + wasnt there 20 mins before, also just after that some sort of construction appears (looks like a shelter for competition contestants), 20 mins later it has vanished + 20 mins later it has reappeared!
Yep - I agree. 14:00 there is something huge at the base of the wall - looks like a finish podium for a race with barriers etc - yet at 13:45 and 14:15 there is nothing at all.