Screen Space Reflections
Screen Space Reflections (SSR) is a real-time rendering technique used in computer graphics to simulate reflections of objects within the current camera view. It works by analyzing the rendered scene's color and depth buffers to trace rays and calculate reflections based on visible screen pixels, without requiring precomputed environment maps or additional geometry. This method is widely used in video games and interactive applications to enhance visual realism with dynamic, view-dependent reflections.
Developers should learn SSR when creating real-time 3D applications, such as video games or simulations, where high-quality reflections are needed without the performance cost of ray tracing or static environment maps. It is particularly useful for rendering reflections on water, glass, or metallic surfaces in dynamic scenes, as it adapts to camera movement and scene changes. However, it has limitations like missing reflections for off-screen objects and artifacts at screen edges, so it's often combined with other techniques like planar reflections or cubemaps.