石墨素描主体线框轮廓

{"title":","style":"academic graphite sketch","camera":{"focal_length":"","sensor":"","aperture":"","angle":"0","distance":""},"material":{"base":"cotton drawing paper","texture":"medium tooth","finish":"matte"},"lighting":{"type":"soft diffused daylight","intensity":"45","shadows":"gentle cross-hatch","highlights":"subtle graphite sheen"},"color_scheme":{"primary":["#000000","#FFFFFF"],"accents":[],"contrast":"medium"},"objects":[{"class":"central_object_placeholder","bbox":[0.25,0.28,0.5,0.46],"relative_size":"large","material":"graphite rendering"},{"class":"construction_views","bbox":[0,0.04,1,0.92],"relative_size":"small","material":"wireframe contour studies"}],"surface_details":{"micro_texture":"paper grain and pencil strokes","imperfections":"eraser smudges","roughness_value":"0.35"},"environment":{"hdri":"none","ambient_color":"#FFFFFF","secondary_light_sources":"none"},"composition":{"background":"blank sketchbook page","layout":"central detailed view surrounded by smaller.。建议：分别做硬光和柔光两版，对比后再选定方向更稳妥。