Is Everything Depends on Mind?

i was thinking about how those trees look just like the images of trees i have in my dreams. What if everything we see is not just dependent on mind, but made out of mental images? One version of idealism is just that everything depends on mind. Well, on some level, i think that's right. But if sayeverything is sort of constructed out of mind, or like there is no matter, it's all just mine a youdot,. then again, it comes down to definition.