I've got a bit of experience with cam and concealment.....
People often tend to think camo is about color, but the number one thing that your eyes notice is actually shape. All those 'bunny ears' and digital pixel military cam patterns arent about looking like leaves - its about breaking up the outline of a 'man shape' against a variety of backgrounds (dirt, foliage, rock).
Snow is actually a bit tricky. It's a very stark, uniform background that really contrasts irregularities, but at the same time, depending on the amount of snowfall it can have its own dark breakthroughs and very subtle tonal patterns (Insert '50 shades of Grey' pun here). Often 'whitewashing' whatever youre trying to conceal can be less effective than youd hope, especially if you've got trees and terrain involved.
THose sheets youve made up would be good for concealing something (or someone...) lying on mostly-snowed ground, but for an upright tent against the trees in that photo, it's going to make for a stark white silhoutte that will stand out. You've also made your dark stripes too regularly spaced (and unconscious tendedy we all tend to have when we deliberately try to make a 'random' pattern), which will look unnatural against a snowy backdrop.
Try and add in some some larger, darker 'branch' patterns like this. It will disrupt the regular lines of the tent and match the patchy tone pattern of the trees against the snow
Pitch it against the side of a drift with some trees behind it so it doesn't interrupt the horizon, and with some trees in front to add some obscurity and depth to the pattern.