Light scattering by a particle containing inclusions is calculated by a combination of ray-tracing and Monte Carlo techniques. The distribution of the inclusions can be sparse or dense. While the individual reflection and refraction events at the outer boundary of a sphere particle are considered by a ray-tracing program, the Monte Carlo routine simulates the internal scattering processes. A dense-medium light-scattering theory based on the introduction of the static structure factor is used to calculate the single scattering characteristics for densely packed inclusions. Numerical results of the single scattering characteristics for a spheroid containing inclusions are discussed.