Read Me First!

First and foremost, this mod is not a fully automatic compatibility mod, rather a tool to mimic one.

Instead of expressly replacing a player's chest cavity to mimic the origin; this mod merely removes certain origin powers that both conflict with an organ in the Chest Cavity mod, and can be easily mimiced by Chest Cavity organs. For example, the merling no longer has the "Gills" power (to breathe in water instead of land), as the Gills organ in Chest Cavity already exists.

How this mod is intended to be used, is when you load into a world, and pick your origin, you can then (using the guide below, or even your own imagination) go into creative and add certain organs to your chest cavity. Then, you can play as normal. (NOTE: You are likely going to want to set, in the Chest Cavity's config file, "KEEP_CHEST_CAVITY" to true. Alternatively, enchant each organ you insert with O-Negative II).

Origin Chest Cavities

Avian

Replace Intestines and Stomach with Herbivore Intestines and Herbivore Stomach.

Arachnnid

Replace Intestines and Stomach with Carnivore Intestines and Carnivore Stomach. Replace Appendix with Silk Gland, and add another Silk Gland in the empty spot. Replace Heart with Insect Heart. (If you're feeling fancy, you can remove the ribs to mimic the Arthropod Style)

Elytrian

Literally zero changes. Enjoy as normal.

Feline

Replace Heart with Small Animal Heart. (If you're feeling fancy, you can replace the digestive tract with one of a carnivore)

Shulk

Literally zero changes. Enjoy as normal. (If you're feeling fancy, you can replace the spleen with a Shulk spleen).

Blazeborn

Blazeborn is a rather problematic case. I could not give them complete immunity to fire (as that is impossible), however, I thought that having hard-set fire resistance with removable weaknesses was unfair. Therefore, I settled with giving them the ability to shoot fireballs. I think that's balanced.

Replace Ribs with Blaze Shells. Replace Heart with Blaze Core. Replace Appendix and Liver with Functioning Blaze Rods, and add another Functioning Blaze Rod in the empty spot.

Enderian

Replace Ribs with Ender Ribs. Replace Spine with Ender Spine.

Merling

Replace Lungs with Gills. (If you're feeling fancy, you can replace the Muscles and Heart with their Saltwater variants).

Phantom

Replace Heart with Rotten Heart. (If you're feeling fancy, you can replace the Ribs with Phantom Ribs).

Final Words

Well, that's basically it. Credits to mathgenuiszach for providing the origins creator that made this much easier to make, and thanks to Apace and TigerOfTroy for creating the original mods (Origins and Chest Cavity) that this is based off of.

I hope you enjoy my silly little mod, and cheers!

• Noelle