Optical processes ----------------- This directory includes examples demonstrating the use of optical processes in the simulation. OpNovice -------- Simulation of optical photons generation and transport. Defines optical surfaces and exercises optical physics processes (Cerenkov, Scintillation, Absorption, Rayleigh, ...). Uses stacking mechanism to count the secondary particles generated. LXe ---- Multi-purpose detector setup implementing: (1) scintillation inside a bulk scintillator with PMTs (2) large wall of small PMTs opposite a Cerenkov slab to show the cone (3) plastic scintillator with wave-length-shifting fiber readout. WLS ---- This application simulates the propagation of photons inside a Wave Length Shifting (WLS) fiber.