Taking a photo of the layout, unfinished of course, and drawing the landscape over it gives me an idea on where I want it to go.

Here's the original of this angle. And the drawn-over one below.

Get it?
Here's the underground yard before.

Kinda hard to picture, huh? And after drawing...

You can see where I want to go a little easier.
I am just starting to use this technique to start my sceniking, I think it will help my assistants to visualize my ideas.
Cuhail
