The source of Radiant energy. At least a couple of The Powers That Be make their homes here. Radiant energy sems to be linked in the mind of many to something noble and pure and good to things like the sun. The Radiant realm is indeed bright, and it is said that there are no shadows in any of its parts, but when the darkness is not visible, it merely hides.
Radiant beings are amazingly lucky or unlucky, and they often will toss it at others.
The reflection of Wyrlde. It is said to be one of the most wonderful places – or one of the worst. Depends on how fortunate you are. Dogs are rumored to come from here.
The home of Lunos. It is said this is where the spirits of cats pass on to. Of note is that a startling number of the beings here appear to be variations on Black Cats.
For good or for ill, one can always find what one seeks here – so a lot of people do not look for anything.
It is said that all luck comes from this dimension, but that seems a bit farfetched to me.