Quote: "LOD works on objects. To use that effectively with .X files, you would not have the level as a single .X model."
You could export it to one big .X files but that wouldn't be so handy. I was thinking about making some sort of my own format, it would store all .X objects and data in 1 file and you could load it using a simpel function
Quote: "DeleD uses prefabs and can save the level to an .X file."
I need to make some prefabs to, and a function in the editor so you can save objects as prefabs would be nice to I think
Quote: "A cloning tool would be handy, like if you spend ages making a tree, a tool that let you copy it then paste it at different Y angles would be very cool, sorta like a brush but 3D."
Yea, I was thinking about making a tool like AXIS CONSTRAIN in 3dsmax,it let's you specify the number of copies and in which direction and stuff it should copy.
Quote: "If your going for editable structures, like you'll be able to do everything inside the one editor - then try and use really technical interfaces with ruler guides and guidelines."
I'll make it as clear as possbile
also I tought about a tilt tool, like if you want to put some trees on your mountain the editor would tilt the tree so that it perfectly alligns to the mountain.
and some other tools for vertex editing, welding vertrices and connecting them so you can avoid gaps in meshes

+ detaching poly's to a different object and attaching objects to another object
thnx all
Specs: AMD Athlon 1800, 256 DDRRam 266mhz, 80GB HD 7200rmp U133, Geforce 4 Ti4400 128mb