Fix bug in Transmittance() computation in PathIntegrator (Volodymyr Kachurovskyi). The transmittance term was incorrectly not being included for the bounce after the first intersection of the path.
Fix bug in Transmittance() computation in PathIntegrator (Volodymyr Kachurovskyi).
The transmittance term was incorrectly not being included for the bounce
after the first intersection of the path.

patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin