Design Blueprint: Blackout Is a Gap Problem

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24119435): Expensive blackout fabric is specified by its transmittance, but the light that reaches a sleeper's eye in a real installation is dominated by the gaps at the edges, not by the fabric. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.