This is part two of a two-part workshop for writing your own path tracer in the OpenGL* Shading Language (GLSL) using Shadertoy. The workshop consists of a presentation that guides you through each step, interspersed with exercises.

This workshop shows how to:

• Build on your ray tracer from Part 1 and implement a path tracer that renders a scene with full global illumination.
• Learn about fundamental concepts in physically based rendering such as global illumination, radiance, the rendering equation, Monte Carlo integration, and path tracing.
• Implement the Monte Carlo integration, and use it to compute direct illumination.
• Write your path tracer.

Prerequisite

• Path-Tracing Workshop Part 1

Speaker

Christoph Peters is a graphics researcher at Intel. He has done real-time rendering research for a decade with recent work focusing on importance sampling strategies for real-time path tracing. He has also lectured at Karlsruhe Institute of Technology for interactive computer graphics. Christoph holds a PhD in computer graphics and a master of science in computer science from the University of Bonn.

Featured Software

Get the Intel® oneAPI Rendering Toolkit: Powerful, open source libraries for high-fidelity rendering and visualization applications.

Additional Resources

• Presentation Slides
• Exercises
  1. Uniform Sphere Sampling
  2. Uniform Hemisphere Sampling
  3. Direct Illumination
  4. Path Tracing
• Exercise Solutions (Includes All Exercises from Parts 1 and 2)
• Progressive Rendering