I made a little program to test your code and it seems fine.
which wall has the problem (there is no "left" in 3-dimensional space)
You hadn't positioned the camera so that might be why you couldn't see the other walls.
I haven't looked at your attatched image, upload it as .jpg then people can just click the view button
cls rgb(0,128,0)
for y = 0 to 100 step 20
for x = 0 to 120 step 60
text x,y,"TEXTURE"
next x
next y
line 0,120,180,120
line 180,0,180,120
get image 2,0,0,180,120
cls 0
rem Walls
rem North Wall
make object box 2,2000,1000,10
rotate object 2,0,0,0
position object 2, 0,500,1005
texture object 2,2
rem East Wall
make object box 3,2000,1000,10
rotate object 3,0,90,0
position object 3, 1005,500,0
texture object 3,2
rem South Wall
make object box 4,2000,1000,10
rotate object 4,0,180,0
position object 4, 0,500,-1005
texture object 4,2
rem West Wall
make object box 5,2000,1000,10
rotate object 5,0,270,0
position object 5, -1005,500,0
texture object 5,2
position camera 500,500,500
sync on
do
turn camera right mousemovex()
sync
loop
"You must be someone's friend to make comments about them." - MySpace lied.
