remake

It is impossible to create a non-linear campaign in the editor of part 3 because campaigns here only end when all available maps have been completed.

You can do it cleverly. For example, first make missions for (for instance) good, then for evil, and in the last mission give the player the opportunity to choose which side to play for. It should turn out like in the "Treasures" campaign from RoE.

That empty space simply has nothing to fill it.

I can help you, but I don't want this to sound like an advertisement, here /topic/2409/ in my campaign everything is filled to the brim. And it looks pretty good... You can easily do something similar with the landscape. In some places (not everywhere!), you can use autocompletion to get wild terrain.