セフィロス
Skeletron Prime
Just to clarify: The latter two options do indeed generate both Crimson and Corruption structures. (Including ore, altars and Orbs/Hearts.) But your world will still intrinsically be a Crimson world or a Corruption world. That's a Terraria engine limitation and not something TerraCustom can overcome.
Corruption with Crimson Caverns means your world is a Corruption world. Upon entering hardmode, the stripes will be Corruption + Hallow. The Angler will give Corruption quests, the Dryad sells Corrupt Seeds, and so on.
Similarly, Crimson with Corruption Caverns means your world is a Crimson world. Upon entering hardmode, the stripes will be Crimson + Hallow. The Angler will give Crimson quests, the Dryad sells Crimson Seeds, and so on.
Thanks for clarify it didnt even know myself what the details on it exactly but something like this i was guessing