archviz rule: an elevation must not lean. hero-facade-front looked up ~4 deg from
4.2 m at a 7.6 m target (columns converged); demo-spawn-view and demo-street-level
were pitched too. All three now sit at the target's height, so pitch and roll are
zero by construction and the verticals stay parallel.
Screenshots re-rendered. A pixel-based verticality check is useless here (banners
and windows break naive edge matching), so the guarantee is geometric and is
recorded that way in the README and MEMORY.
zwitschi
749147f3e9