Is random.mg documented anywhere?

Question

I know you can get a random image for a specific album via this:

http://[nickname].smugmug.com/photos/random.mg?AlbumID=[albumid]&AlbumKey=[albumkey]&Size=[150x150, Th, etc.]

But, can you do the same thing for a category or subcategory?

Basically, is there anywhere that random.mg is fully documented? :-)

Answer 1

There is random.mg for an album but not for a category or subcategory, I'm sorry. There's no more documentation than the link you have posted.