2 characters, cooperative pose, portal game theme, sci-fi environment, Aperture Science facility, blue and orange portals, Chell and Atlas or P-body, jumpsuits, portal gun in hand, futuristic boots, action pose entering portal, white sterile laboratory, complex machinery, companion cube, soft overhead lighting, dynamic angle, high contrast, detailed textures, reflective surfaces, cool color palette, advanced technology, puzzle-solving action, 3/4 view, depth of field, co-op gameplay scene.