HI David, 1. the texture should be included as a jpg file near your.obj file and the .obj file must contain a path to that texture. it will loaded and displayed by the loader without having something to do (by default). Does your obj scene handle further objects ?? (that would explain the popup with the same error)
2) it depend on the kind of terrain you need, but for example you can use the elevation class: http://www.closier.nl/blog/?p=69
