Poser

n. difficult problem; male model; impostor, pretender

Poser is a 3D rendering and animation software program optimized for models that depict the human figure in three-dimensional form.
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Noun
1. a person who habitually pretends to be something he is not
(synonym) poseur
(hypernym) exhibitionist, show-off
(hyponym) poseuse
(derivation) pose, impersonate, personate
2. a person who poses for a photographer or painter or sculptor; "the president didn't have time to be a model so the artist worked from photos"
(synonym) model
(hypernym) assistant, helper, help, supporter
(hyponym) artist's model, sitter
(derivation) model, pose, sit, posture
3. a particularly difficult or baffling question or problem
(synonym) stumper, toughie, sticker
(hypernym) problem
(derivation) perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound

n. difficult question, difficult request, difficult query, hard problem; actor, one who acts, performer (in plays, films, etc.)

v. put, put down, lay down; set; pose, put forth (a question); lay, place