Unfortunately giving a bunch of files for images to the players before sessions each time is probably a little bit too cumbersome, though we might attempt it at some point just to see if it works. With all of the new giant default list of images to choose from it's not that big of an issue.
I'll add some screenshots as long as you promise not to judge my artistry too much.
Some snaps from the waterfall cave I made:
And then a random encounter:
