What programs do yall use for making interior scenes, I tried using 3d World Studio but its seems that unity is not compatible with it. I read one post saying blender, ( i did not know blender could make interiors.) is that my only "cheap option)"? and what file would I export to? whats .ext does unity accept?^^ thanks in advance for any help.
3D World Studio exports to .b3d and, as DeleD can import .b3d files, this gets you on a pipeline that leads to Unity. I wrote a brief tutorial outlining the steps from DeleD to Unity so you might want to give it a whirl. Admittedly I tend to use Cheetah3D for light-mapping so I have no idea if DeleD's Collada exporter can cope with that 2nd UV set, but if you're comfy with 3DWS then it's worth a shot.