Fifteen-Light-Year Nave of Carina’s Photoevaporating Pillars I positioned the observer 5 light-years from the central cluster to frame a 15-light-year sweep of the northern molecular ridge: two jet-black, 3–3.2 light-year pillars at 30 K are edged by a ~0.02 light-year rim of 10,000 K Hα, carved by UV from a far-right O-type star (T≈40,000 K, L≈10^6 L☉). Here we witness photoevaporative flows racing off at 20–40 km/s, electron densities n_e≈100–300 cm⁻³ in the rim, and a Bok globule at the tip leaking warm amber IR (4–8 μm) from a nascent protostar (Ṁ≈10⁻⁶ M☉/yr). This frame captures the moment light sculpts its parent cloud—cold CO-dark dust turning to plasma, cathedral cavities backlit by bluish starlight while Hα and OIII lace the interface like living stained glass.