Everytime i try to change the terrain size zeroeditor won´t start(load the map) afterwards.
I tried it several times for my spacemap but nogo.Right after creating the new map i run the editor chenged the size from 256,256 tiles to 1,1tiles saved it quit editor and try to run it again but the Editor won´t start anymore from bfbuilder. I also loose at least one Fraction during resize.

Are you trying to remove (or minimise) the terrain grid, to allow for the space battle? I ask because I had that idea, but after making a smaller terrain I found I couldn't place objects (eg, a bespin platform) unless it was over the terrain.

If you look at Bespin Platforms level, there is a terrain there, and the platforms are set up in the sky, with a death region if you fall off them and (i think) a boundary to stop flyers.

Perhaps you could use a regular terrain size but set the terrain height to -256 or something (I started experimenting with -ve terrain height, but didn't proceed past -100 so I don't know if there is a limit).

Well i guess it´s to late now for the space map i´m currently working at but would be nice to know for future upcoming maps.
And yes i tried to minimize the map size BEFORE i start working on it. I changed the size to 1.1 tiles saved it quit editor and tried to reload the map again with no luck. The editor won´t start from bfbuilder .

Well what i wanted for the Spacemap was no terrain or at least the smallest size i could use. Perhaps i could place it inside a big object like a StarDestroyer.