Reflection Probe

Reflection Probe (Reflection Probe) is a technical term that is extremely important in rendering and optimizing game graphics (technical art). An explanation of the technology that takes a 360-degree panoramic image (cube map) of the surrounding area from a specific position in a scene, either in advance or dynamically, and applies realistic background reflections to surrounding mirrored materials such as metal or water surfaces.

Real-world analogy: A reflective magic trick in which a ``spherical photo (cube map) that reflects 360 degrees of the surrounding area'' is floated in front of a shiny robot's eyes, and the photo is projected onto the robot's body

Reflection Probe is a system that places ``360-degree spherical cameras (probes)'' around the scene and pre-takes spherical panoramic photos (cube map textures) of the surrounding scenery visible from that location.'' When a shiny car or wet floor (metal or smooth material) comes into range of this probe, the GPU superimposes a 360-degree photo onto the body and projects it in a deformed manner, creating a beautiful reflection of the surrounding neon lights and walls reflected on the body, just like real ray tracing.

Detailed mechanism and operating principle

Place "Reflection Probe" around the mirror asset and press the "Bake" button in advance to generate a 360-degree cube map image around that location and apply it to the Smoothness reflection of the material.