Adding Texture to a Blank Torque Object

I've walled in my soccer field with invisible walls so as to keep the ball and the player from falling off the field. It works wonderfully, but being without an actual stadium surrounding the field, it looks funny. You can see forever, and if you do run up to the edge of the field, it's obvious that you're floating in the middle of nothing. So I'd like to wall the field in to look like it's indoors. I thought that might be as simple as adding textures to my walls, but I've run into a problem with the rendering of the walls in that when I attempt to make them visible, the game crashes. Any ideas on making these objects visible, and hopefully adding textures? Thanks! :)