I found this Pak128 building template.
(http://graphics.simutrans.com/albums/userpics/10003/building_tile_template.png)
I kept thinking this as an upside down building, with the green roof on the buttom. ;D
http://graphics.simutrans.com/displayimage.php?album=9&pos=5 (http://graphics.simutrans.com/displayimage.php?album=9&pos=5)
Hah! Yes, I see it shift back and forth both ways... :)
That's for the upcoming revision of Underground mode, where you see the world from underneath. Mole's eye view.
Engineers gotta love seeing the foundations... :D
reminds me of the spinning optical illusions
hopefully, no one will make such an addon :P