cosplayer, Warhammer 40K Darktide, character costume, power armor, grimdark aesthetic, chainsword prop, lasgun replica, Imperial Guard uniform, Astra Militarum insignia, skull motifs, weathered textures, metallic finish, LED lighting effects, servo-skull accessory, combat pose, dystopian cityscape backdrop, hive city, industrial structures, smoggy atmosphere, dramatic lighting, action-packed stance, mid-battle scene, 3/4 view, dynamic composition, high contrast lighting, cinematic feel, detailed prosthetics, face paint, grim expression, battle-worn gear, cybernetic implants, gothic architecture, towering spires, dark clouds, sunset ambiance.