In DipoleSubsurfaceIntegrator, still create IrradiancePoints if incident irradiance is zero.
In DipoleSubsurfaceIntegrator, still create IrradiancePoints if incident irradiance is zero.
patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin