Question: What Solid Angle application did Anthony Hemingway use in his feature film directorial debut?
Sentence (from "Radiance"): The SI unit of radiance is the watt per steradian per square metre (), while that of spectral radiance in frequency is the watt per steradian per square metre per hertz () and that of spectral radiance in wavelength is the watt per steradian per square metre, per metre ()—commonly the watt per steradian per square metre per nanometre ().
Relevant evidence: No