The student will explore existing global illumination models and methods used for physically based rendering. The acquired knowledge will be used to implement a physically based rendering technique utilizing a path-tracing algorithm for rendering scenes with a larger number of spheres. The renderer will be implemented in WebGPU. To achieve real-time rendering, the student will explore the use of appropriate acceleration data structures and apply principles of progressive rendering. In the theoretical part, the student will discuss the mathematical principles behind physically based rendering, including energy conservation, microfacet theory, and BRDF (Bidirectional Reflectance Distribution Functions), as well as BSDF (Bidirectional Scattering Distribution Function). The student will also compare the performance of the developed renderer on scenes of different sizes.