//! Implementations of the **Medium** base class provide various
//! representations of volumetric scattering properties in a region of
//! space.
//!
//! - GridDensityMedium
//! - HomogeneousMedium
//!
//! ## Grid Density Medium
//!
//! 
//!
//! ## Homogeneous Medium
//!
//! 
pub mod grid;
pub mod homogeneous;