Influencer Hero Splits Sketch and Render Across Decades

These are some of my favorite prompts. This one is done for influencers of different decades. 

4 images, 16:9, do this for 4 legendary decades: class BecomingPoster:
    def __init__(self, TOPIC):
        s = infer(TOPIC)                       # hero, landmark, cast, insignia, sketches, motto, seam, palette
        self.s = s
        self.elements = s.sketches             # ONE set; left = sketch_of(e), right = render_of(e)

    def style_field(self, x, y):               # P₁/P₂: style varies across the seam curve
        return SKETCH if x < self.seam_curve(y) else RENDER

    def render(self):
        left  = [ annotated_sketch(e) for e in self.elements ] + motto + tagline + title_plate   # P₄
        right = cinematic(hero=self.s.hero, landmark=self.s.landmark, cast=self.s.cast,
                          insignia=self.s.insignia, palette=self.s.palette)                      # P₅
        hero  = split_style(self.s.hero, self. style_field)          # hero straddles: half sketch, half real
        seam  = process_band(self.s.seam, along=self.seam_curve)    # P₂: fire/ink/circuit, continuous
        return compose(left, seam, right, hero)

    def verify(self, img):
        assert hero_straddles(img, self.seam_curve),                 "P₁: hero on one side"
        assert seam_continuous(img) and seam_is_process(img, self.s.seam), "P₂: hard edge / tear"
        assert bijection(sketch_elements(img), render_elements(img)), "P₃: orphan elements"
        assert motto(img) and tagline(img) and title_plate(img),      "P₄"
        assert cinematic(img.right) and palette(img, self.s.palette), "P₅"

BecomingPoster(TOPIC).render()