Portals: A way through

With my visual and audible landscapes I create a portal to another world; the cascades and atmospheres allready exist within me. Music, art and stories enable me to manifest and transfer these ideas.

To fully apply this concept on my work, I am trying to go deeper into the portal subject. A research, from three relevant angles:

1. Define a portal within several philosophical views; as an Omnist I would like to get the universal picture.
2. Research form and function of a portal in the arts, as well as a reflection upon my own atristic views.
3. Analyse the concept of a portal within RP/G, from my researched philosophical definition.

So, I hear you ask, what actually is a 'Portal'? Let's find a way through.