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November 30, 2025

WIP - Belly Expansion

Hello, everyone! November has been a very busy month, so I didn't have as much time as I'd like to spend on this. However, I've made some decent progress lately so I thought I'd share this in the meantime.

I sculpted some new blendshapes for the belly weight gain route. I always forget how tedious it can be to make these in between shapes, especially now that there are so many for this model. Plus every shape needs a male version with slightly different proportions. Here's all the shapes in the model so far with the new belly shapes on the bottom row.

There's also this annoying issue where the blendshape order is reversed between Maya and Unity, which basically means I have to reconnect all the blendshape nodes in the correct order whenever I add a new one. Otherwise the code in Unity will apply the wrong blendshape. That means I have to enter the 7th layer of Hell (also known as the Maya Node Editor). Then I have to reroute all this spaghetti in a way that makes sense to Unity without accidentally breaking anything else.

Thankfully that part is out of the way and I can work on getting it set up in Unity without too much hassle. Here's a little preview of the belly growth in action.

I still need to make the hyper obese and blob stages of the belly, which will require a totally different setup to work with the softbody physics sim. The character will probably push the belly along the ground in the hyper obese stage. Then the blob stage will be a big rollable version of the belly with the rest of character's body being pulled along for the ride.

With that said, there's still a decent amount of work to be done, but I hope to have this build ready within the next 2 weeks. Thanks for your patience and I'll see you again soon!

Comments (44)

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Santiago Bianchi · December 12, 2025

Love this, it's looking great! By far one of the best weight gain/expansion/feederism games

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karson · December 11, 2025

Did you update the thighs on the model to expand with the body? If so that is awesome. I feel like that was the only thing missing since they got envelopes by the sides of the belly usually

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CheddaVr · December 11, 2025

Can you add more fruit inflations please?

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blobygon · December 11, 2025

I'll consider adding more eventually. Any particular suggestions?

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NomadicPervert · December 4, 2025

well it's all looking great so far. tho i hope you're taking plenty of breaks between the the tedious and stressful part of the project. i can deal with waiting a while for something new just fine, especially with a few to just one person working on it. but what i don't like is seeing a project stressing someone so much they quit or forcing themselves cause they feel like they immediately have to have something out. i hope you're doing well.

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Kiunny · December 4, 2025

I think the stuck on belly scene in horizontal position with legs and arms useless, (the classic scene) is now mandatory.

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DarkStar76 · December 4, 2025

i know you have alot of ideas but when she eats another piece of gum she gets even bigger for an update

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blobygon · December 4, 2025

I can't make her any bigger due to technical limitations, but maybe I'll find a way around it some day

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Zeedee · December 4, 2025

can't wait! i wanna request again that eating sounds be separated from vocal audio in settings; the vocal noises to me can be a little bothersome especially at larger weights where the character starts grunting a lot, but i love the chewing and swallowing sounds, and it's a shame that i can't have one without the other. hopefully that's an easy change to make! i also think facial expression demeanor customization would be fun - like the faces they make when idle, eating, changing weight class, etc. alongside the two flustered/nervous-looking ones that we see by default depending on maps, i think others like content, joyous, or annoyed would be fun as well. thanks for the consideration, i know you already have so much on your plate!

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blobygon · December 4, 2025

I can probably separate those sounds. I will also do an emote system update at some point so we can have some control over her expressions

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Madam Olea · December 3, 2025

My question is will the Fat limbs and face be a weight gain path in the next update? So I can have a mix of a little bit of everything when Fattening up? C:

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blobygon · December 4, 2025

No, probably not this time. I'll be focusing on belly expansion only

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rattie · December 2, 2025

I'm seeing fupa

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Jables · December 1, 2025

Youre the best man, the long term commitment to this has been super impressive, keep up the good work I’m curious how feasible would it be to add a ‘sitting-down’ state to the character regardless of size? Even if it’s just sitting on the floor, not necessarily interacting with chairs Sorry to add to the endless feature requests lol

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blobygon · December 3, 2025

Probably a bit easier than sitting in a chair. I will probably give it a shot at some point. Probably whenever I add some kind of pose/emote system.

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BrasByDesign · December 1, 2025

Some really interesting updates recently - can't say that I fully understand the tube one, but I appreciate the technical expertise nonetheless! Great work! Whilst I know we're a good way off the inflation update, I wondered if it would be possible to at least request the consideration of a fully inflated/over-inflated female form that is boobless, or less 'booby'? It would really just be for the final stage of the blueberry and/or a fully inflated form, and would be a good alternative for those of us who appreciate that if a person reaches a size where their arms and legs have been swallowed, then the breasts may have also been stretched out and swallowed into the overall mass, too. It would be a nice option to have. Anyway, great work, and I admire your patience with that node nightmare fuel!

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blobygon · December 3, 2025

I think that should be possible at some point

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Inspector-Jasper · December 1, 2025

sweet this looks awesome, cant wait.

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Sprectra · December 1, 2025

I really enjoy whenever you go into detail on things like this. It's really interesting and it's cool too because it shows how complicated it is to make a character stretch and expand in a way that looks natural

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SuperHans · December 1, 2025

yes belly centric shapes

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TSR · December 1, 2025

Great work and I'm so excited to play with it. Thank you for all the hard work and take care. Btw it is really great to take us in the making process and to see how much work it is to make this

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Nick · December 1, 2025

This looks really good and take plenty of time, I'm looking forward to whatever you come up with! ^^

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Antraz · December 1, 2025

So in 10 years you ARE going to turn this game into the next Elden Ring with full online multiplayer support, right????

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blobygon · December 1, 2025

Yeah totally. But itll probably be more like 100 years

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Dumpty001 · November 30, 2025

Looks awesome Blobygon!

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Cave Bear · November 30, 2025

Looks like it's coming along great man! Keep up the good work, and don't rush it if it needs more time. It's Thanksgiving weekend after all. Have some turkey and enjoy yourself.

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Beachball Jay · November 30, 2025

Take your time with this, just don't burn out doing what you and so many of us love. Can't wait to see what you cook up!

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Chilpo · November 30, 2025

Dude this game has so much potential and it just keeps improving. Take all the time you need with this and good luck! I imagine the inflation progression will be similar to the round progression so it would theoretically be easier for you?

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blobygon · November 30, 2025

Yeah hopefully it'll be easier but we'll see

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Choob Boova · November 30, 2025

Right on haha. If I must suggest I would really like to see an improvement to weight gain in the limbs. Perhaps a toggle of sorts pertaining to distribution?

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blobygon · November 30, 2025

I may look into that at some point

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Hooligan Freak Plus · November 30, 2025

Hell yeah! Uh, hyper penis when? Lol!

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blobygon · November 30, 2025

Not sure when I'll get to it but it would be nice to have a penis size option of some sort

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Scarf Guy · November 30, 2025

This is amazing

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Prism7 · November 30, 2025

Please take your time with this! If anyone can figure out the obstacles, it's you, Blobygon, I believe in ya! Can't wait to see belly expansion in your wonderful game! 🥰

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M. Turner · November 30, 2025

You created an incredible game, I'm excited about all the new features that will be in the game. I would also like to share my ideas. I had thought about new types of body inflation, like if you drank a can of soda, you would inflate and float like a balloon, and the way to return to normal would be by burping or farting. Another idea is to have more NPCs on more maps or NPCs that were also affected by gluttony. I know all this will take time, but it would be amazing if there were more things in the game in the future.

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Grace Ashcroft · November 30, 2025

I love the current update so much blobygon Take your time blobygon no rush I'm still supporting your work blobygon keep up the outstanding work 💯🙏🩷

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Tip Nine · November 30, 2025

Looks good so far!

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Tip Nine · November 30, 2025

Something I noticed in the current version is that when the model switches to the hyper or blob stages, the body hair color switches to match the regular hair color instead of the body hair color. I've also noticed that the rollable round shape always seems to get stuck/refuse to roll when upside down. Will these be addressed in the next/future build(s)?

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Colonel Frosting · November 30, 2025

Hyyyype!

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Spirit jam · November 30, 2025

As usual, cudos to you man! 🤩 Honestly what you go through with the coding is just unbelievable and I’m always excited to see what you have cooking. Can’t wait till this is ready, and love to see more shapes in the future. And not gonna lie, this form would add to the favorites with Wide and round for me 😁.

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YourBestClownFriend · November 30, 2025

Oooh great to see how things are comin' along!! Looking forward to whatcha have for us, when the time is right! Ya do awesome stuff, Blobygon!!

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Joob toob · November 30, 2025

can't fuckin' wait!!

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Ultranova · November 30, 2025

Incredible! I love the body shape variety. I continue to be wowed by these