Screen Space Reflection (SSR)

Perform ray tracing in RTR (Screen Space Ray Tracing)

• Does not require 3D primitives (triangles, BVH, etc)
• Two fundamental tasks:
  • Intersection: between any ray and the scene
  • Shading: contribution from intersected pixels to the shading point

怎么知道光线与物体相交呢？

但是步长太小太大都不好，怎么办？