Make sure u look at both of them before. notice how the boat has skates and they are ripples in the water. Isn't this a little odd shouldn't it be ice.
Rofl i got the first one. The first one is 3 piles of glittering dust. The normal is almost almost always 4. And they boat does have skates....haha nice find.
The boats are supposed to "skate" across the ice, but GW's engine won't allow displaying that easily. You'll notice the boats in watery cutscenes never actually move either, just the camera.
There are some areas where ice is incorrectly treated as water.