Q 278

What are the actual mechanical differences between having total concealment and being invisible?

Also, reposting as there has been no answer:

229

In the standard great wheel cosmology, what planes are coterminous/coexistent with which transitive planes?

Q 230

If a medium creature is lying prone underneath a hip-high table that is about a third of the size of its square, what kind of cover bonus against what kind of attack would it benefit from, and conversely, would it be subject to any penalties beyond those stemming from lying prone?