Taichi Path tracer

A progressive path tracer written in taichi

Features:

• Global illumination via unbiased Monte Carlo path tracing
• Physically based Specular shading(GGX)
• Lambert diffuse shading
• Ray-Sphere intersection
• Unbiasd russain roule
• Antialiasing via super-sampling
• Depth of field effect of lens camera
• Multiple Importance Sampling
  • Balance heuristic
  • Cosine-weighted pdf
  • ggx normal weighted pdf
• ACES Tone mapping
• Bloom effect
• Gamma correction of final result

The 5 balls in the scene are:

1. rough golden ball
2. smooth ceramics ball
3. the light source ball
4. huge ground rough iron ball
5. smooth metal ball

Usage

pip3 install taichi
python3 pt.py

and you a ready to go.

Scroll mouse to zoom in/out, press and drag the mouse to see a interactive result. You can also press shift while scrolling mouse to change the focal length of the camera.