Hydrogen rendered as disco floor lights

A flight through VLA data of Milky Way hydrogen. This is an attempt to show a solid surface changing imperceptibly into a diffuse volume. There are 240 planes, each with a different slice of the data, with transparency controlled by colour. Each has a build modifer that randomly increases the rendered faces, with staggered start times increasing outwards from the two initial meshes. The jumping in colour at the end is unintentional, but I kinda like it.