image task: convert uploaded character reference into single flat base-color reference image. critical preservation override the uploaded image is the only character source. preserve exactly facial structure, eye shape, nose shape, mouth shape, hairline, hairstyle, head shape, neck length, shoulder width, body proportion, original pose, composition, camera angle. no redesign, no beautification, no face modification. output: single bust image, keep original framing. mandatory: remove all sculpted lighting, shadows, ambient occlusion(ao), surface shading, tone gradient, highlights, crease shadows, neck shadows, collarbone shadows, hair shading. uniform flat gray-white tone, no visible light source direction, no volume rendering. quality: clinical production character reference plate, ultra-flat, low contrast, only keep silhouette and character form.