Is art a portal to another dimension?

No, it's just an expression of the artist and an experience of the viewer. It has nothing to do with dimension in the way that you are implying.

Art has a very intuitive understanding of observable dimensions, but is relatively clueless about what dimensions are and thus thinks that dimensions are something magical or akin to the science fiction that it doesn't come close to understanding.

We are all blessed with special tools to help guide us in our own unique journey in this life. Art comes in many forms. It is through the Spirit that we find portals into other dimensions, deemed necessary for this journey. Albeit, we must first awaken to our true spiritual self, before we can begin to travel within other dimensions. This requires intense concentration into the spiritual realm, outside the confines of this world. :D

Peace and Blessings always...

Yes it is, When I look at a fine painting or sculpture, My heart goes into total admiration for a job well done for my enjoyment forever, This is how I view all of gods creations, As works of art.

That which makes us wonder

Makes our minds to wander

And takes us through a portal

To a new port of our mind

@Glow Wings; Are your "special tools", spatial tools? Or spiritual tools?

Art may reflect our irrational sphere to a given extent, but in no way is a bridge to transcendence.

art is the mirror of thought..is thought a portal?

There is only 3 dimensions, The dimension we are in now and heaven and hell.

It's a portal to imagination, for good or bad, more real or less real. We read our impressions onto the l'objet d'art.

Absolutely! It invites us to see things as the artist sees them, and that's always at least interesting, and sometimes even useful.

Sometimes, if the artist's good, it can change the world!

In Ghostbusters 2 it is. But more seriously I think it could be as much as our imaginations use it to be.