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 10 - Path Trace Subsurface Scattering

This series of images show subsurface scattering. Subsurface scattering is implemented as a uniform participating medium bounded by some object wrapped by a refractive material. The first image shows the refractive bounding spheres, the second image shows the participating medium without the refractive wrapper. The third image shows the combination of the materials resulting in subsurface scattering. For these images, the index of refractivity is 1.05 and the scatter rate is 3%. The fourth image shows subsurface scattering with 5% scatter rate, trying to limit the amount of light that is allowed through the medium, restricting the amount of subsurface scattering.
Refractive Shells
 Bounded Medium
 Subsurface Scattering 3%
Subsurface Scattering 5%