Fix MSVC build, where hexadecimal floating-point constants aren't supported.
Fix MSVC build, where hexadecimal floating-point constants aren't supported.
patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin