post-apocalyptic environment, Christmas in Fallout 76, festive decorations, ruined buildings, snowfall, Christmas tree with radiated ornaments, Vault Boy Santa Claus costume, mutant reindeer, glowing radstag, tinsel and lights on broken structures, survivor in winter gear, gas mask with Santa hat, holding a candy cane melee weapon, festive campfire, irradiated snowflakes, glowing fissure site, holiday-themed power armor, Nuka-Cola with bow, 3/4 view, soft winter light, dynamic shadows, atmospheric mood, wide-angle shot.