-It's possible to use David Hyde's GenSurf in SOF mapping? If not, what terrain generators are available?

-How to make spherical and round objects-such as a ball, a bathtub, a light bulb-using brushes and SOFRadiant's tools? Can I make this objects in any other program and export them to the editor?

Yeah , I was also wondering what , if any, were good programs to make objects in..Will cinema 4d work???

- GenSurf works with SoF1 yes. You'll prolly have to do the sloppy grounds detail tho to avoid Hall of Mirrors bugs.

- You can't build spheric brushes or anything round for that matter, in the Quake2/SoF1 engines. However you can build a sphere looking item using a lot of simpler brushes (there's a script for that in a version of Radiant, WOLFRadiant I believe, you could do just that in it and then read the file in SoFRadiant without problem). You'll want that "sphere" 'detail' too.

Now... For items, you can build stuff in Radiant and set it 'detail' to add more details to your map. eg: a lamp etc. However, it's not very conveniant.

An other way to do it, recommended, would be to build your own models in a 3D modeler and export them to the SoF2 format (.ghl I believe, not sure tho) so you can use them as entities (just like SoF1 has sofas, trashes - also certain lights) in your map. You'll then have to distribute those models along with your map.

There's documentation about modelling for SoF1 somewhere. I believe in the SoF SDK, this very site and also PlanetSoF if my memory's OK.

Have fun building :)

-Can I use MilkShape3D to create models for SOF1? If yes, any plugins are needed?

-QuakeII and Half-life's models and prefabs can be used in SOF?

- On second thought I don't think you can use Q2 models or models from any other Quake-based game for that matter because SoF1 uses the GHL (GHOUL) format which is unique to it :-/

- I think you only can use 3DSMax to export models to the GHOUL format (unless other software can work with 3DS plug-ins) check out this page : http://www.modsonline.com/modules.php?op=modload&name=SOFMapping&file=modeling1