The first time, they looked a lot like your avatar believe it or not.
After more trips I seem to see a lot of elephants and other animals. But they are always a dense-grey color, surrounded by bright fantastic colors of the world.
And yes, when you are tripping like that, you are in a completely different dimension. Your brain opens up tenfold which lets you experience the world in completely different, and sometimes, reality-shattering ways. Which is why a lot of people describe it as dying or going to heaven.
I remember these beings floated me to the top of what felt like a great council. A council full of elders, but structure. They all looked different, some resembled animals (mostly birds in my case) and they all had a place to be, with important beings being closer to the top, less important beings were the base, the strength of the council that held this enormous power up. Once these guys floated me up to the top to the main council being, it almost felt like I was looking into a mirror, not physically as he was a big black cat with some human features, but recognized my conscious feelings. We did not physically speak, only understood each other fundamentally. After what seemed like a few hours, (reality only about 15 minutes) theses beings slowly lowered me back to comfortably and my trip ended.
Our brain is big and mysterious, like our current dimension. Problem is most people walk through the world blind without realizing it and just accept reality as is. You definitely have a more rounded and fundamentally sound view on the world after you try DMT, more so than LSD/Shrooms.