Fix background、natural background

fix background、natural background

(((((nsfw:1.5))))),ugly, painting, sketch, (worst quality:2), (low quality:2), (normal quality:2), lowres, bad anatomy, bad hands, fewer digits, extra digit, normal quality, ((monochrome)), ((grayscale)), futanari, full-package_futanari, nipplepierces, collapsed eyeshadow, multiple eyeblows, vaginas in breasts, holes on breasts, age spot,bad anatomy, long_neck, long_body, longbody, deformed mutated disfigured, missing arms, extra_arms, mutated hands, extra_legs, bad hands, poorly_drawn_hands, malformed_hands, missing_limb, floating_limbs, disconnected_limbs, extra_fingers, bad fingers, liquid fingers, poorly drawn fingers, missing fingers, extra digit, fewer digits, ugly face, deformed eyes, partial face, partial head, bad face, inaccurate limb, cropped,out of focus,blurry,bokeh