This is an homage to the Doctor Who Christmas Special (2014).

and here is a “painted-over” version of a Minecraft screen shot.

Here’s a comparison of the original screen cap and what I did with it. There is a particular brush that looks like bunches of leaves, and another brush called “cloud”. I was surprised to find out that your ERASER could also take the shape of these brushes. Erasing with the leaf shape seemed to improve the tree a lot.