I never noticed before that I didnt have screenies of the User Interface on here. They were in a separate thread about developing some of the graphics.
Here is one:
![The user interface](./download/file.php?id=80237&sid=4b1497c09f2247d67469b9ddcd3723e7)
- The user interface
- Praningbury Transport, 23rd Feb 2013.png (42.53 KiB) Viewed 6543 times
Notice the minipic of the layout. The system can allow a different minipic per orientation, but since those havent been created, I just point the minipic to the same sprite.
This one also demonstrates the "transparent" grass. Basically if a sprite on an airport has the base grass sprite as its ground sprite, then the system checks to see what was there before, and uses that. So on desert, you get desert; on snow, snow; on tropical grass, tropical grass.
If you want to test it out and see what it is like, then download svn://svn.openttd.org/branches/NewGRF_ports and compile it. It includes 4 .grfs (airportsbasic.grf, airportsextended.grf, seaplaneport.grf, realworldairports.grf). The first two will load automatically, and the other 2 need to be manually added using the ingame interface.