kdを0.33としてみた。
plastic = s.newMaterial( "standard",[ "kc", vector3( 0.6, 0.6, 0.6 ),"kd", 0.33 ] )
plastic2 = s.newMaterial( "standard",[ "kc", vector3( 0.6, 0.6, 0.6 ),"kd", 0.33 ] )
plastic3 = s.newMaterial( "standard",[ "kc", vector3( 0.6, 0.6, 0.6 ),"kd", 0.33 ] )
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