3D渲染军人战士士兵军装持枪人像照片

realistic illustration, central figure of an adult male, focused expression, holding an assault rifle in right hand pointing downward, adjusting helmet with left hand, wearing camouflage uniform and tactical vest, helmet and goggles, fully equipped, single gray wall background, color scheme of gray, camouflage green, and black, detailed camouflage patterns and tactical gear textures, tense and serious military atmosphere, professional and alert mood