Radiance is a blinding light that flows and pulses like liquid. From its blinding white light, crawl and fly forth radiant Organisms. Radiance is a form of matter from which organisms can form. It is located and formed in the heavenly Empryean, and most radiant lifeforms inhabit this place as well. The study of the Radiance and its organisms is Radiology.
Radiance behaves like flowing white plasma, with a neon glow and a hypnotizing aura. It coalesces with whatever is around it, be it the corpse of a deadly beast, or the levitating stone obelisks that make up ground on the Empyrean.
The Radiance modifies these components, until life is created. Even compared to umbral lifeforms, radiant beings are exotic and alien in appearance. Although some have some semblance of organisms below them.