Hey, I'll check that out. Shouldn't be hard to fix. You can build for any mod or TS. All entities and textures you place can be filled in manually, and you can create your own texture set files by editing the .ts files with notepad (those are just examples any way). Pretty soon I'll add entity sets as well, so you can choose custom entity sets. Most likely I'll add a project setup screen where you can define your mod, create custom BSP options and create custom texture & entity sets. I'm not familiar with other modular building apps, but if I knew the file formats for them, it might be able to export my internal 'grid' to such apps. Of course there could be many constraints, grid sizes might not fit, or other modular apps might not recognise multiple floors. the basic function of this app is to help mappers quickly block out their maps, create several large areas and connect them, then map inside those area's like you would after having blocked out the map. For instance, you can remove the ceilings from rooms to open up access to the floor above, creating higher rooms and height differences in your maps. I am thinking of implementing a XYZ-View editor for the grid so you can sketch the maps in 3D, offering greater editing options than now.