Hi, here's some screens of a world editor I've been working on. It features mesh matrices with alpha blending textures, manipulation of lighting, objects and their properties, load/save and export (sends all required files to a single map folder) and the code for loading externally has already been finished.
I'm also planning on making an adapted loading code for use with newton. It will allow the program to search for a rigid body file applied to an object file and will apply it in the program so you can create Newton based worlds quickly.
screens show a scene i made real quick. makes use of a 'forest' function where you press CNTRL + f and the currently selected object will be places randomly, within range of the marker object on the landscape. You can use it for trees, rocks etc. anything that needs a afirly random pattern.