new terarium need some help

[unclejay]

well im building a nice 48"L x 16"w x 31"h enclosure out of wood im all most done i need to go get the glass cut for the doors mabee later this week, still building doors right now. im gonna house a 3ft corn snake in there and i want it to look very nice and natural. my question is can i use some sand in one area of the cage if i provide plenty of other substrates of better choice in another area or two. i really want this enclosure to be a conversation peice and want it to look the best it can. i would like to do like a desert area and a woodland area with some nice branches for climbing. i will post some pic later but i gotta get to work right now, oh yea what about water i have had a few snakes in my day but its been awile and im alot older (28) and my taste has changed from my childhood cages/enclosure but any way any help would be appreiciated

thats, Jason