Material point method (MPM) is a particle-based simulation technique. My implementation can be found here.

The two images directly below are renders from a path tracer coded in C++. The path tracer utilizes the Monte Carlo integration method to render 3-dimensional geometry with global illumination. Other implemented features in the tracer include photon mapping, depth of field (thin lens camera), multiple importance sampling, and more.

coffee shop model

shadertoy: gudetama