Fantasy biomes

[Mjerchel12]

I think it would be helpful to add some kind of fantasy, fictional biomes (at least to the least of biomes, they don't need to generate naturally), maybe even with corresponding reliefs. Ideas might include things like fungal forests, volcanical lands, basalt columns, dead lands, artificall biomes (Coruscant style), rocky wastelands, crystal lands

Additionaly, what might be interesting would be adding a new type of lakes-acid lakes and possibility to add acid/lava rivers. In general also, creating new sea biomes as well, would be fun (even more "optional" so too speak, but town beneath the waves sound cool too)

[DeuzeksMcKinna]

Besides the reliefs, if it's not going to be naturally generated, there's no reason to add any of these at all. There's plenty of plus sign buttons all around to add custom biomes, custom lake groups, etc.
You want those stuff? You can add them in your map.

[Mjerchel12]

Is there any way to add custom reliefs though?

[Avengium]

Yes. You can write it in the code and add custom reliefs. The code is on github.

[Azgaar]

It's not really a way :)
There is no way to doit via the UI. It would be nice to have, but there is no