If you live in a climate that brings snow in winter, some white camouflage can help a bit to get an edge during games. And it certainly gets you in suitable mood for playing :).
Overall I think snow (and other) camos are designed for 200-300 meter distances and above. So when we play paintball and the opponents are usually under 100 meters and probably in the 20-40 meter range, the camo's effectiveness is greatly reduced. When you stay absolutely still, it can still help, especially if things are happening around you that gather opponents attention. But mostly wearing snow camo is nice for getting into the groove of the winter games :).
Having this style thin polyester over the clothes camo has other good going for it too. It keeps the snow outside and prevents getting wet for some degree. When snow does not stick, it won't melt on you either. It is not waterproof, but for 3-5 hour games it has worked great, usually the clothes under it are dry. Paint usually stays in the top layer too.
Putting some camo on your marker can be done with those stretchy camo tapes, I have some, but personally I don't like them much, cleaning them after getting hit is a pain. Instead buy a couple of extra neck gaiters on the camo pattern of your choice. Cut them for suitable sizes, use some needle and thread and white elastic bands where suitable and you get customized camo for your marker that can be thrown to the washing machine :).
Here are links links to stuff you need for this loadout (some links are affiliate):
Top and pants, Multicam Alpine camo: https://ebay.us/XsBizZ
Ski mask, Multicam Alpine: https://ebay.us/fJyhOP
Neck gaiter, Multicam Alpine: https://ebay.us/c7j4Ck
Dump pouch, Multicam Alpine https://ebay.us/l0ijuZ
Chest Rig from wtfidea.com, Multicam Alpine: https://www.wtfidea.com/accessory-panel-44-dye-dam-milsig-mg100-tmc-t15-ak-m4-magazines-power-up-panel/
with Harness 02 https://www.wtfidea.com/harness-02/
with Waist Strap 01 https://www.wtfidea.com/waist-strap-01/
Push Paintball mask (different colors available) https://amzn.to/4gofSqm
Extra lenses for Push goggles https://amzn.to/42AABDW
Exalt Barrel Maid Squeeqee https://amzn.to/42AIzx2
Check out some winter gameplay:
