rule 34 3d artwork accipitrid accipitriform alpha channel anthro avian beak bearded vulture bird claws clothed clothing digital media artwork duo erection feathers female female penetrated genitals hi res horn humanoid kobold kobold dellarte low poly male malefemale male penetrating male penetrating female nude old world vulture penetration penis reptile scalie sex simple background size difference tik tik transparent background vulture 6069560