Realistic Ray Tracing

Homework 1 - Monte Carlo Summation
Homework 2 - Monte Carlo Integration
Homework 3 - Macbeth Color Checker XYZ
Homework 4 - Macbeth Color Checker
Homework 5 - Cornell Box
Homework 6 - Ward BRDF
Homework 7 - Mixture Density
Homework 8 - Participating Medium
Homework 9 - Rayleigh Scattering
Homework 10 - Subsurface Scattering
Homework 11 - Dielectric Material
Homework 12 - Final Image

Homework 8 - Path Trace a Participating Medium

The images below show the participating medium within an adapted cornell box. The first image shows several spheres of a bounded medium. The medium has a scatter rate that varies according to height from 1% to 5% and 0% absorbtion rate for each sphere. The following two images show the same uniform medium encompassing the environment. Here the scatter rate is 1% and, for the second image, the absorbtion rate is 0%, for the third image the absorbtion rate is 1%. The medium clearly modifies the scene (no pun intended) by adding a foggy element to the atmosphere within the box.
Bounded Medium
 Participating Medium - Scatter only
 Participating Medium - Scatter and Absorb