"To help people understand the volumetric aspect of volume graphics, I use a sandcastle as an analogy. Each voxel is like a grain of sand. When grouped together, the grains form a castle, making a 3D model."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.