I made this little 20 line program (minus comments) and what it does is place you (a silly green ball) on a very large matrix and places 150 trees in random places. It reminds me of the Northwest a bit, but I know it's very flat

I'll have to put a mountain-textured skysphere around it sometime
`Prepare some stuff and display Loading text
SYNC ON : SYNC RATE 60 : HIDE MOUSE : AUTOCAM OFF : SET DISPLAY MODE 1024,768,32 : SET TEXT SIZE 28 : SET TEXT FONT "Impact" : SYNC : CENTER TEXT 512,350,"Loading..." : SYNC
`Load the matrix texture and make the matrix
LOAD IMAGE "grass.jpg",1
MAKE MATRIX 1,10000,10000,100,100 : PREPARE MATRIX TEXTURE 1,1,1,1 : SET MATRIX TEXTURE 1,1,1 : RANDOMIZE MATRIX 1,15 : UPDATE MATRIX 1
`Load all the trees and put em in random spots
FOR I=1 TO 151
LOAD OBJECT "evergreen.x",I : SET OBJECT TRANSPARENCY I,4 : SCALE OBJECT I,5000,5000,5000 : XPOZ=RND(10000) : ZPOZ=RND(10000) : POSITION OBJECT I,XPOZ,GET GROUND HEIGHT(1,XPOZ,ZPOZ)-1.5,ZPOZ : YROTATE OBJECT I,RND(359)+1
NEXT I
`Set some variables and make the player
PLR=152 : PLRA=1 : PLRY#=GET GROUND HEIGHT(1,5000,5000) : MAKE OBJECT SPHERE PLR,10,12,12 : COLOR OBJECT PLR,RGB(200,200,200) : POSITION OBJECT PLR,5000,PLRY#,5000 : COLOR OBJECT PLR,RGB(10,130,80)
`Set the fog and stuff
FOG ON : FOG COLOR RGB(180,180,180) : FOG DISTANCE 750 : BACKDROP ON : COLOR BACKDROP RGB(180,180,180)
`Begin main loop
DO
IF UPKEY()=1 THEN MOVE OBJECT PLR,3
IF DOWNKEY()=1 THEN MOVE OBJECT PLR,-3
IF LEFTKEY()=1 THEN PLRA=PLRA-3
IF RIGHTKEY()=1 THEN PLRA=PLRA+3
PLRY#=GET GROUND HEIGHT(1,OBJECT POSITION X(PLR),OBJECT POSITION Z(PLR))+5
POSITION OBJECT PLR,OBJECT POSITION X(PLR),PLRY#,OBJECT POSITION Z(PLR)
POSITION CAMERA OBJECT POSITION X(PLR),0,OBJECT POSITION Z(PLR)
YROTATE OBJECT PLR,PLRA : YROTATE CAMERA PLRA : MOVE CAMERA -50 : POSITION CAMERA CAMERA POSITION X(),GET GROUND HEIGHT(1,CAMERA POSITION X(),CAMERA POSITION Z())+15,CAMERA POSITION Z()
POINT CAMERA OBJECT POSITION X(PLR),OBJECT POSITION Y(PLR)+5,OBJECT POSITION Z(PLR)
SYNC
LOOP
The media is (i think) attached to this post. Just put it in with the .EXE
Enjoy