You need to state that you didn't draw or make most of those planes used. You need to state the fact that you simply put them into a picture, otherwise it may come off to some as being a thief. I'm not saying you are trying to be, but you really have to be careful and be clear on what you made when you use stuff that you didn't make, otherwise it is highly frowned upon.
I would suggest to just steer clear of calling anything you didn't make entirely art. In other words, I would just get rid of the image import ones, and the 3d planes messing around with ones.