Some advice?

I was bored, so I made a forest.

Tell me what you think, and how to impove. Go easy on me though.

But... How do I post the pictures? I took screen caps, but how do I upload thumbnails?

When you post or edit a post, go to Additional Options (below the Post Message screen). You will see Manage Attachments. Now upload your stuff.

It will automatically make thumbnails if the images are too big.

Voila.
Newbie forest.

*edit* Oops. Meant to crop the second one down to remove all windows o.o

It's not so bad for a newbie forest :> . You need some more doodads such as shrubs and flowers/mushrooms. More tile variation, try adding some dirt and lumpy grass. You can then add some bumps, maybe some noise + smooth, or some higher and lower parts.

DeSty

Around the sides of the trees pack it with doodads. Shrubs, flowers, etc. It will make it look so much more natural because it hides the ugly bottoms of the trees ;)

OR you can select one tree, push Crtl+Shift+~ to select all the trees, then push Crtl+PgDown twice to make the trees spiky bottoms go down, under the terrain!