sentences:  In contrast, id Tech 4, which featured volume-based shadows, had very sharply defined shadows.Numerous other advanced graphical effects such as various materials for lighting, high dynamic range rendering-centric effects, bloom, crepuscular rays (volumetric lighting), radiosity, soft particles, pixel shader effects, alpha to coverage, post processing, Screen Space Reflection, dynamic water surfaces, procedural animation, cloth simulation, depth of field, and motion blur, are contained.Multi-threaded processing on the CPU is done for many of its tasks, including rendering, game logic, AI, physics, and sound processing.