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Ray tracing & path tracing

Where raymarching steps, ray tracing solves. These shaders intersect rays with surfaces directly and follow the light that bounces off them — often accumulating samples across frames in a buffer pass to converge on a clean image.

2 shaders

• Explained GLSL
  Analytic Ray-Traced Spheres GameDev.net lightingRaytracingfundamentals
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• Explained GLSL
  Progressive Path Tracer GameDev.net Raytracingmultipassfundamentals
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