The InZOI Script Mods Update is arriving October 15th!
With over a year and a half since the release of InZOI, players have been waiting for more information on being able to create and download InZOI Script Mods, giving them more freedom to change the game as they see fit and to expand the creative community around the game itself. Now, the systems are starting to get in place and the update to allow InZOI Script Mods is now just around the corner!
Kjun’s Developer Diary this week focuses on the creation of script mods with the tools that will be available for players once the next InZOI Update arrives on October 15th, 2026.
Unlike with The Sims AI CC and Mods which EA states in the Maker Program application that they’re against, the InZOI team openly invites players to try out their AI LLMs and create AI Mods. How that will turn out will be checked more accurately when the patch drops.
Wednesday October 7th Catch-Up
Kjun’s Follow Up to “10.02.26 Getting Ready for inZOI’s Modding Update”
Hello, everyone.
Thank you for all the replies to last week’s post. I’ve read through the whole thread, from the welcome for script mods to the long, detailed suggestions and the concerns. I’d like to give honest answers to the points that came up most often.
“Are mods replacing the base game?”
Many of you said mods should expand the game, not complete it, and I agree. Mod support does not replace our own work on the fundamentals. Our team is still working on personality, autonomy, emotions and animation, and we will not hand that work over to modders. At the same time, I’ve been amazed by what creators like ZoiWorks and the creator of Age of Magic have made in such a short time. We’ll look at what players love about these mods, and where it makes sense, we’ll consider bringing similar ideas into the game officially.
Traits and IDs
Some of you asked why existing traits like Volunteer were replaced, when modders were able to add new trait IDs. Last August, we made changes to some of the more abstract traits. At the time, there were technical limitations we couldn’t work around, and that’s why we made that decision. We’ll make sure this doesn’t happen again.
Expressions, eye contact and reactions
Many of you pointed out that Zois don’t look at their phones or the camera, don’t make eye contact, and show the same expression whether they’re happy or sad. You’re right that this breaks immersion. We’re currently working on improving eye contact and gaze. Your examples were really helpful: the labor scene, guests standing still at parties, families who don’t come to graduations, and street performers who don’t react. I believe it’s important for Zois and NPCs to react to what’s happening around them. In October, we plan to add reactions such as Zois greeting people they know, and hosts asking guests they don’t get along with to leave after a while. We’ll keep developing more reactions like these.
Bugs you reported
We’ve gathered the issues raised in this thread and shared them with the team, including need scaling on day-length settings other than 48 min/day, group activities, restaurant hosting and ratings, duplicated mod textures, and the gaps between lots and sidewalks. I know many of you have waited a long time for things we’ve talked about over the past four years. I don’t take your patience for granted. Even the harsh comments come from people who care about inZOI, and that means a lot to us. Thank you, as always. Kjun
Developer Diary Recap
○ This developer diary recap primarily focuses on the use of LLMs (Language Learning Models) and other forms of Generative AI (Artificial Intelligence), in combination with InZOI’s MCP (Model Context Protocol) to create InZOI Script Mods with the next update.
○ The next update is coming to InZOI October 15th, next Thursday, per the Developer Diary message for this week.
○ This diary showcases some mods and the prompts used to create them, created by InZOI Developers recently.
LLM Script Mods Created
○ Car Painter – A mod to allow your Zoi to paint their own car.
○ Auto Home Decorator – A mod that decorates a room entirely on its own, using no UI mods and only Lua Scripts. It can also use user cheats, Free Edit Mode, and freely adjust the size and placement of objects to decorate/build the room.
○ Auto Kick Zoi – A mod that automatically kicks anyone who comes within a specific radius, excluding kids and loved ones.
○ Dowon Drift – A car drifting mod that adds new controls and creates proper drifting.
○ Pied Piper – A mod that causes every Zoi encountered by the player to follow them around “like the pied piper”.
○ Flying Car – A mod that enables Q & E controls to start and stop flying.
○ Flying Zoi – A mod that lets a Zoi fly with both arms held up when the players presses space bar.
○ Flying Destroyer Zoi – A mod that lets a Zoi fly around more freely, adds FX Effects around their feet, allows them to freely ascend and descend, and lets them use laser eyes to light items and the ground on fire.
○ Real Painting – A mod that adds a painting system to the painting skill/easel in InZOI, allowing the player to paint directly on the canvas.
○ Visual Novel – A mod that adds cutscenes and UI Effects to give the aesthetics and vibes of a visual novel, adding cutscenes with text, portraits, etc.
This Week’s Developer Diary
10.09.26 MCP Script Modding
Hello, Creators! Happy Friday. We’re back with some exciting news.
A new inZOI update is scheduled for next Thursday, the 15th.
In this week’s announcement, we’d first like to share the modding guide video prepared last month, followed by an overview of the major changes coming in next week’s update.
As this update was prepared within a relatively short period of time, it may not address everything you were hoping for. Rather than trying to make enormous changes all at once, we hope you’ll see this as part of our effort to strengthen and improve inZOI’s fundamentals through more frequent updates.
While there are no major new systems this time, the main focus of this update is on features that give you greater control over autonomy—such as preventing customers from freely using objects in businesses—as well as the long-requested free placement options in Build Mode and improvements to modding.
The changes coming in this update will be detailed in the comment below.
With the rapid development of AI technology, modding has become much more approachable. In the video we’re sharing today, we’ve tried to provide guidance that makes the modding process easier to follow, and we hope some of you will give it a try yourselves.
We know there are still areas where the game may not yet feel as polished as you would like. With your valuable feedback, we’ll continue working quickly to make inZOI more refined and complete.
Have a wonderful weekend, everyone. We’ll be back next week with more details about the update.
Thank you!
-Kjun
Continuation of Messages
Major Reworks and Simulation Improvements
Half-bath animations and facial expressions
Half-bath animations have been extended to flow more naturally, and relaxed facial expressions have been added to replace the previous neutral expressions.
Child Zois will alternate between two different relaxation animations.
Issues where adult male character poses would sink into or float above the bathtub have been fixed.
Complete overhaul of 17 resident households
The appearances, backgrounds, temperaments, traits, and relationships of 17 default households across Dowon, Bliss Bay, and Cahaya have been reworked.
Note: These changes will fully apply only to newly started games. Existing save files will only receive the updated household descriptions and photos.
Autonomy and conversation system improvements
Lot activities: Lot visit activity plans have been improved according to age group, and Zois can now naturally move between and participate in activities across nearby lots, such as Nuri Square and Harang Stream.
Autonomous conversations: Zois now select conversation topics based on their own and the other Zoi’s emotional state, intimacy level, and relationship, including family, friendship, romance, and business relationships.
Reactions and warnings: When Zois encounter someone they know, their greetings will vary depending on their relationship and mood. If a Zoi with a poor relationship trespasses into their home, they will receive two warnings before being kicked out.
Autocomplete support for user cheats.
Individual door permissions for each household member.
Lot Autonomy Plan Edit Mode.
When multiple copies of the same object are available, Zois will prioritize objects on the nearest floor and at the shortest distance.
New Content and Items
Wall-mounted first-aid medicine cabinet
Added under Build Mode > Props > Decoration for 100.
Provides five medication options for colds, motion sickness, allergies, bronchitis, and pain relief, as well as an option to check the status of the medicine cabinet.
CAZ and clothing additions
Five hairstyles.
Three mustaches and three beards.
Three makeup presets.
Two raincoat/rain boot items.
Six themed outfits.
Five anime-style masks.
Various additional clothing and shoes.
Expanded Build Mode and objects
More than 113 new build and interactive objects have been added, including salon assets, European-style clock towers, doors and large signs, LED shelves, outdoor sculptures, and two tile textures.
A tool for drawing basement walls has been added.
Cheat functions for free object placement and scaling have been added.
UI and Quality-of-Life Improvements
Unified overhead icons (Plumbob FX)
When a stat increases, its corresponding increase icon will now appear directly above the Zoi’s head. There are 31 icons in total.
The previous numerical stages and progress bars have been removed.
Icons for low needs and thought bubble designs have also been improved.
Expanded Zoi creation (CAZ)
When creating a family, you can now preconfigure intimacy levels, preferences (likes/dislikes), and relationships.
First-person view and convenience features
First-person view is now available while surfing and diving.
Lot/business management: You can now remove an active business template and immediately replace employees without having to fire them first.
Social events and movement improvements
Events will now begin after all participating Zois have arrived.
Participants have also been improved to move all the way inside the event venue.
Performance drops caused by large gatherings have been reduced by introducing a system that reuses nearby Zois.
Engine, System, and Mod Support
Improvements to walking while holding hands
Improvements have been made to separation while moving, waiting when one Zoi falls behind, clipping through doors, wrist and elbow bending, and finger poses.
Holding hands will now persist after saving and loading.
Zois will automatically let go of each other’s hands when using an umbrella.
Canvas sharing improvements
Preference information will now be saved when uploading Zoi presets.
Custom Lot Autonomy Plans will now be included when uploading and sharing lot presets.
Major ModKit improvements
Lua script mod support: Supports integration with MCP tools and AI assistants.
Additional modding tools: Customization of the game’s built-in post-process filters, a new Hat Wizard tool, and improved UI/UX and workflow speed for the Build and Vehicle Wizards.
In-game mod management: A management launcher has been added to toggle Overlay UI mods on and off from the HUD. The Mod Manager now also supports custom aliases for mods, along with improved naming for sorting UI options.
Do you have any thoughts, comments, or opinions on the upcoming InZOI Script Mods update? Let us know down below, and make sure to follow Sims Community and we’ll keep you in the loop with all of your favorite life simulation games!