First Batch of Environments Concepts

So here is the first few concept paintings I've done in regards to a portfolio assignment I have to do. I'm making a 3D environment. I was initially going to do a jungle setting, but one of my teachers recommended I avoid doing that because the foliage would be a ton of work, so I went back to the drawing board and started playing around with some new ideas. I'll be making more today and possibly tomorrow, before I find one I really like. In the mean time, here is a few I made just recently!