off? howbout on? THEORETICALLY, you can switch it using each object individually by using SET OBJECT TEXTURE (give or take OBJECT). The parameters are how the texture is UVed and the second is aflag for mipmapping. It doesn't seem to work though. Probably a bug.
They did ditch texture backdrop. It's now obsolete. Use a sky box or sphere. Check this out:
load image "space.bmp",1
make object sphere 1, 4000
texture object 1, 1
do
position object 1, camera position x(), camera position y() camera position z()
loop
Insto-Skybox!
1.00 GHZ processor, 256 MB RAM, GeForce 3 64MB, SB Live!, 8 cans of soda per day