When i open Scenery/Terrain Surfaces, i will see many concrete entrance available. What things that can we make with all that entrances? I am very confused! Any help plzzz????[/align]

Those things are originally supposed to be put where a coaster or track ride enters the terrain and goes underground. You can use them to make mine or tunnel entrances, basically.

But alot of times, when you make a coaster that goes underground, you cant edit anything. There are two ways around this.

#1. Learn to hack the terrain. This is only open for Vista and XP users. Unless you are running bootcamp on your mac . http://www.ataricommunity.com/forums/sho...option.txt (Yes it does work for x61 (32 bit), x86 (64 bit) vista)

#2. Use terrain blocks. Terrain blocks allow you to put a roof block (thin) and a Side block (thick to cover the area the track goes under. Now you can use your terrain tools to cover the edges and use a rock set such as Shyguy's ( http://www.ataricommunity.com/forums/sho...p?t=631522 ) to cover it further (then spice it up with some trees). Then you put your concrete edges, there are different selections for different looks, at the sides to make it have the 'tunnel' effect.

I hope this helped. ~Pippintoon