Board Thread:Suggestions forum/@comment-27200931-20170628213922/@comment-25101089-20170630005121

A better solution might just be to expand the size of Pinnath Gelin biome. After all, I did stretch a couple of the other fiefdom biomes beyond what reasonably makes sense for this exact reason.

I checked the code to be sure and the base hilliness of a biome doesn't actually affect village generation at all. Village generation is only affected by the characteristics of the variants, not the biome itself. (Villages will not generate in a hilly variant, or in a forest variant. Hypothetically - as the generation currently works - they would have no such qualms about generating in a biome whose base characteristics are hilly or forested, but that's a moot point, because none of the current village base biomes are particularly hilly or forested.)