I've been using the Lot Editor for over six months, and have used the "press D twice" method to place multiple overlay textures on one tile. However, I was told earlier today that using this method would have conflicting overlays at multiple zoom levels. And so some questions to the devoted community:
1: Would the overlays conflict with each other on multiple zoom levels?
2: Would the overlays show up fine if they are used in different parts of the tile?
3: Is it safe?
This should illustrate the problem you'd be facing with multiple overlays:
First, lets make a simple lot with two overlay textures:
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fimg339.imageshack.us%2Fimg339%2F2687%2Froadraillenj0.jpg&hash=3ed060f7d64fbcf9c5e68c5ff702313022357073)
Then, let's plop a few of them in game.
Sometimes they do look as intended:
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fimg208.imageshack.us%2Fimg208%2F2391%2Frailoverroadll1.jpg&hash=f37d9328ccdff95303b92846153c8dba7e6426c5)
But equally often they won't:
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fimg225.imageshack.us%2Fimg225%2F2130%2Froadoverrailuz6.jpg&hash=22c5c6a4f550a799a0ed7c34bccf250b2b841202)
You can never control in which order the overlay textures are displayed in game.