undergrounds tunnels and fog with objects 3d =S

hola!
tengo una GRAN DUDA. resulta que despues de probar algunas coasters con tuneles bajo tierra y terrenenos ( o terraforming) en objetos 3DS. , me agarro la duda de como demonios hacer eso! me encanto!
mi duda es? como hay que hacer para hacer un terreno tan bien logrado?
y lo mas importante,
????????? como hacen para saber que la via del track va a pasar justo por donde esta el tunel?
????????? por alguna ocasion , se usa el tunnel maker?
en fin , me gustaria que me dieran un mini tutorial o una explicacion para llevar a cabo esto. AH! y tambien me gustaria saber a como hacer tuneles de niebla, es que cuando los hago y el tren pasa por este, el objeto desaparece, osea ,cuando se mete dentro del objeto 3d =S =S

tengan en cuenta que solo tengo el anim8or y object creator, no registrado porque no tengo tarjeta de credito y mis padres no me la prestan

hasta otra!

P.D: excuse me , but i dont have enough english bocabulary for write my reply. if some one understand the post please HELP ME!! and if he can , please , traduce this text for the persons ho doesnt understand the post. thanks! a lots thanks!

[coolbeans326]

Yo no s?????????

[Dirk_Ermen]

I usted ha obtenido el texto por un traductor y le consigo problema no
enteramente. por lo tanto no puedo ayudarle desafortunadamente.

jere is fast traduction , please HELP ME!

hello! I have a GREAT DOUBT is that despues to prove rebel or cold fusion, both with tuneles with objects 3d and lands with objects also, I take hold the doubt of like demons doing that! I enchant myself! my doubt is? since there is to make to do a land obtained so well? and but the important thing, since they let to know that via of track is going to happen right through where this the tunnel? by some occasion, is used tunnel to maker? in short, gustaria me whom to a mini tutorial or an explanation gave me to carry out this. AH! and also gustaria to know to me to like doing tuneles of fog, it is that when I make and the train it happens through this, the object disappears, osea, when 3d puts within the object = S = S consider that single I have the anim8or and object creator, not registered because I do not have credito card and my parents me do not lend it

until another one!