Posts by Solarint

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.1.3

Rebalanced default presets.
Heavily nerfed scavs (disabled faster cqb reaction, reduced hearing range)
Goons can now aim for your head (sometimes).
Killa and tagilla hold down the trigger for longer and wait less between shots.
Buffed most bosses and followers.
Re-enabled "Aim Center Mass" for PMCs on default difficulty, was a mistake.
Slightly lowered "Aim Center Mass Point" to reduce headshots, was raised quite a bit in 4.1.0, but accidental headshots are a bit too frequent now.
Lots of small…

Solarint

Saturday, 4:59 am

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Rebalanced default presets.

Heavily nerfed scavs (disabled faster cqb reaction).

Goons can now aim for your head (sometimes).

Killa and tagilla hold down the trigger for longer and wait less between shots.

Buffed most bosses and followers.

Re-enabled "Aim Center Mass" for PMCs on default difficulty, was a mistake.

Slightly lowered "Aim Center Mass Point" to reduce headshots, was raised quite a bit in 4.1.0, but accidental headshots are a bit too frequent now.

Lots of small changes to bot configs, too many to list.

**You'll need to create a new preset to get the new changes, but old presets are working fine.**

Fixes:

Fixed many boss followers being broken.

Disabled smoothing or any modification to bot steering when a bot isn't in combat. Spinny bots should be fixed now. Will return to this in the future, but something is breaking when using the new smoothing solution.

Fixed some bots getting stuck in a vanilla layer, making them unable to move or fight enemies (fairly sure I fixed this, its hard to test for, but I couldn't find any bots doing it after)

Project Fika - Fixed error spam and broken bots when 1 player extracts, but the rest stay in raid.

Project Fika - Fixed footstep sound from player being triggered when they weren't moving. (Oops)

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Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.1.2

Fixed bots not reacting to enemies after being disabled by an ai limiter. Should be fully compatible again.

Added temp workaround to fix bots being unable to hear footsteps with project fika headless client. Bots will use a very simple hearing stimulus until a permanent fix can be made.

Bots now stop aiming down sights when reloading.

Solarint

Wednesday, 8:01 pm

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Fixed bots not reacting to enemies after being disabled by an ai limiter. Should be fully compatible again.

Added temp workaround to fix bots being unable to hear footsteps with project fika headless client. Bots will use a very simple hearing stimulus until a permanent fix can be made.

Bots now stop aiming down sights when reloading.

Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.1.1

Fixed Vision Speed Multiplier being opposite what it should be. Causing bots to see very slowly on hard sain presets, and see quickly on easy presets.
All old presets are going to be affected.
Sorry BSG changed something at some point, and I only realized now.

Fixed a few cases of bots failing to calculate a path to their enemy.

Solarint

Jul 29th 2025

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Fixed Vision Speed Multiplier being opposite what it should be. Causing bots to see very slowly on hard sain presets, and see quickly on easy presets.

All old presets are going to be affected.

Sorry BSG changed something at some point, and I only realized now.

Fixed a few cases of bots failing to calculate a path to their enemy.

Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.1.0 Hotfix

Fixed bots rapidly swapping between targets to suppress.

Fixed bots being unable to track close range targets moving perpendicular to them.

Disabled smoothing when a bot has successfully aimed and a target and is starting to shoot.

Fixed smoothing config settings not being applied.

Fixed bots suppressing into walls and staring into walls in certain situations.

Fixed error that can happen when changing preset.

Solarint

Jul 28th 2025

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Fixed bots rapidly swapping between targets to suppress.

Fixed bots being unable to track close range targets moving perpendicular to them.

Disabled smoothing when a bot has successfully aimed and a target and is starting to shoot.

Fixed smoothing config settings not being applied.

Fixed bots suppressing into walls and staring into walls in certain situations.

Fixed error that can happen when changing preset.

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Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.1.0

for SPT 3.11.x

Reworked Bot turning and smoothing calculations.
Added new ballistics prediction for Bot Aim. They should account for distance and leading targets fairly accurately.
Thank you Janky for the help in the math of all this.

Improved performance, especially for large amounts of bots fighting across the map.
Reworked Bot Cover Finder.
Reworked Bot Suppression. A bot's personality now tells a bot how it should suppress enemies, some bots will be jumpy, some wont suppress at all.
Improved Bot…

Solarint

Jul 28th 2025

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for SPT 3.11.x

Reworked Bot turning and smoothing calculations.

Added new ballistics prediction for Bot Aim. They should account for distance and leading targets fairly accurately.

Thank you Janky for the help in the math of all this.

Improved performance, especially for large amounts of bots fighting across the map.

Reworked Bot Cover Finder.

Reworked Bot Suppression. A bot's personality now tells a bot how it should suppress enemies, some bots will be jumpy, some wont suppress at all.

Improved Bot pathfinding and sprinting.

Reduced how often bots will lean, and made their leans more accurate to how a person would lean into corners as they seek a target.

Reworked how bots decide to seek and hold cover, or search for enemies.

Improved bot group search behavior.

Different Personality Types will search for enemies at different “paces”, some will carefully peek corners, others will aggressively swing angles.

Improved simulated arm injuries on bots.

Improved bot simulated recoil.

Reworked how bots select different enemies.

Reduced the amount of situations where a bot could be stuck in a loop of searching, then going back to cover, then searching again without ever making progress.

Known issues:

Doors are 45% cursed.

Infinite mag bug. It's a bug in the EFT build that SPT 3.11 is running on, it's already been fixed by BSG.

Bot busy hands.

Tagilla is bored of using his hammer for a little while.

Bots are still not the most intelligent about ammo conservation in all situations.

All presets are out of date, many old settings were setup incorrectly due to de-obfuscated eft code being difficult to understand, check tool tips!

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Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.0.4

Fixed ADS Spam causing inter dimensional scavs that break your sound and cause desync with fika.
Fixed a few bot reload bugs.

Solarint

Jul 17th 2025

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Fixed ADS Spam causing inter dimensional scavs that break your sound and cause desync with fika.
Fixed a few bot reload bugs.

Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.0.3

Full credit to @dwesterwick for the fixes here.
Gameplay Changes:

Fixed bots being unable to extract
Bots will now use the new SAIN steering system while extracting (instead of only looking straight ahead)

Code Changes:

Fixed BotPathFollowerClass.WalkToPoint() not returning true if Bot.Mover.CanGoToPoint() returns true (which is the case with RunToPoint())
Expose mustHaveCompletePath as an argument in WalkToPoint() and RunToPoint()
Fixed NRE spam for GetEnemyToShoot() if priorityEnemy == null
Fixed…

Solarint

Jul 15th 2025

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Changelog : https://github.com/dwesterwick…/4.0.3-rc1/SAIN-4.0.3.zip
Full credit to DanW for the fixes here.

Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.0.2

Changes to door opening to try to make it less broken. When a door is opened or closed, it will disable collision for 3 seconds on any nearby bots. It's still pretty awful, but BSG updated their ai door opener in a future patch, so just hold tight.
Removed all of sain's mag refilling logic and reverted everything back to mostly vanilla. Bots should never run out of ammo now.
Fixed bots being unable to move when trying to melee.
Bots still get the infinite mag bug, and it looks like its a vanilla…

Solarint

Jul 9th 2025

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Changes to door opening to try to make it less broken. When a door is opened or closed, it will disable collision for 3 seconds on any nearby bots. It's still pretty awful, but BSG updated their ai door opener in a future patch, so just hold tight.
Removed all of sain's mag refilling logic and reverted everything back to mostly vanilla. Bots should never run out of ammo now.
Fixed bots being unable to move when trying to melee.
Bots still get the infinite mag bug, and it looks like its a vanilla eft issue.
Added some config options for suppression under Global Settings -> Mind
Added slight random sway to bot look directions so they look less robotic. It increases or decreases depending on if they are moving, aiming down sights, or their arms are injured. Can be configured or disabled in GlobalSettings -> Steering.
Slight adjustments to bot turn smoothing.
Bots can now suppress any target at any time if they meet requirements, rather than just their focused enemy.
Bots now check if any target is shootable rather than just their focus enemy. Should prevent bots from ignoring obvious enemies.

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Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.0.1

SPT 3.11.x

Fixed error spam when out of raid.
Bots now use the same movement smoothing and inertia as players.
Added more control over turn smoothing and corrected a few issues with it (can be edited from globalsettings .json file of your preset)
Increased smoothing for better visual results, but it now changes depending on if a bot is aiming, at peace, sprinting, ect.
Decoupled bot character steering from movement direction, bot animations now look like players do.

Solarint

Jul 8th 2025

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SPT 3.11.x

Fixed error spam when out of raid.

Bots now use the same movement smoothing and inertia as players.

Added more control over turn smoothing and corrected a few issues with it (can be edited from globalsettings .json file of your preset)

Increased smoothing for better visual results, but it now changes depending on if a bot is aiming, at peace, sprinting, ect.

Decoupled bot character steering from movement direction, bot animations now look like players do.

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Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 4.0.0

SPT 3.11.3 Only.
New:
Silky Smooth bot turning.
Added smoothing to bot movement, leaning, speed changes, and posed changes.
Added new path visibility system that is multi-threaded. Bots should no longer stare into walls if their enemy is on the other side of it, but rather will look to the place that enemy would appear. (still needs some work, but is mostly functional)
Improved bot reactions to grenades, including their own grenades (not perfect but the entire system should be redone)
Rewrote how…

Solarint

Jul 7th 2025

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SPT 3.11.3 Only.
New:
Silky Smooth bot turning.

Added smoothing to bot movement, leaning, speed changes, and posed changes.

Added new path visibility system that is multi-threaded. Bots should no longer stare into walls if their enemy is on the other side of it, but rather will look to the place that enemy would appear. (still needs some work, but is mostly functional)

Improved bot reactions to grenades, including their own grenades (not perfect but the entire system should be redone)

Rewrote how audible distance of footstep sounds is calculated, should be more closely aligned with how it sounds to players.

Fixed flashlight detection not working.

Moved all bots in combat to use sain's pathfinder for walking instead of just sprinting.

Greatly increased the amount of suppressing fire from bots. (Not configurable yet)

Added "Strafe Speed" Config option for bot settings. Depending on bot type and difficulty bots will strafe faster or slower.

Rewrote how bots are ticked and initialized.

Fixed a vanilla behavior not being removed from scavs and overwriting sain behavior.

Added new multithreaded functions.
- Enemy Place Job (for checking distance and visibility of last known positions)
- Path Visibility Job (Finds the place a bot should look at, based on where their enemies last know position)

Optimized everything based on Unity Profiling data.

Added new Hearing sensor that should both run better and expand functionality.

Added Bot deafening system from gunfire. If a shot goes off close to a bot, they will be partially deaf to quieter sounds such as footsteps.

Added audio masking system where bots will be unable to hear a sound if they heard something louder than that sound very recently.

The intent is to allow players to use voice-lines to cover up the sounds of them healing.

Added new system for bullet fly-by detection on bots that tracks each bullet's real position to see if it comes close to them.
Many small tweaks to bot decision making to resolve issues and improve behavior.

Fixed:

Everything.

Multiple patches were targeting the wrong methods, and a few were entirely outdated.

Fixed bots teleporting.

Fixed integrated suppressors not counting as being suppressed for bot hearing.

Simplified a bunch of systems that were not working correctly.

And a lot more.

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Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 3.3.1

Small bug fixes from contributors:

• Fix: Use HeadCommon for players without eyes aka infected by @gottyduke
• Fix: Added a check to see if the bot is alive when trying to use healing by @DragonX86-dev

Solarint

Jun 25th 2025

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Small bug fixes from contributors:

• Fix: Use HeadCommon for players without eyes aka infected by @gottyduke
• Fix: Added a check to see if the bot is alive when trying to use healing by @DragonX86-dev

Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 3.3.0

- Updated for 3.11

No new functionality has been added, this is simply to update SAIN to work on 3.11. Bugs that were on 3.10 are most likely going to be in 3.11 until Solar gets the time to work on SAIN again. Please be patient.
Thanks to all new contributors for helping, and an especially big thanks to Brie for updating most of the AI logic that was broken with 3.11.

Solarint

Jun 1st 2025

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- Updated for 3.11

No new functionality has been added, this is simply to update SAIN to work on 3.10. Bugs that were on 3.10 are most likely going to be in 3.11 until Solar gets the time to work on SAIN again. Please be patient.

Thanks to all new contributors for helping, and an especially big thanks to Brie for updating most of the AI logic that was broken with 3.11.

Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 3.2.1

SPT 3.10.X ONLY

VirusTotal Results
There is still 1 false positive and "Antiy-AVL" thinks SAIN is "pornware".
Changes:
Reworked Bot Suppression.

1. Added New Tier System for how much bots are suppressed. Old: Suppressed / Heavy Suppressed. New: Light, Medium, Heavy, Extreme
2. Bots get Light Suppression from almost any bullet flying by them.
3. Increased the effect that suppression has on bot stats.
4. Add Suppression Amp to boost suppression received when bullets are very close to a bot's head.
5. Suppression

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Solarint

Dec 17th 2024

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VirusTotal Results

There is still 1 false positive and "Antiy-AVL" thinks SAIN is "pornware".

Changes:

Reworked Bot Suppression.

1. Added New Tier System for how much bots are suppressed. Old: Suppressed / Heavy Suppressed. New: Light, Medium, Heavy, Extreme
2. Bots get Light Suppression from almost any bullet flying by them.
3. Increased the effect that suppression has on bot stats.
4. Add Suppression Amp to boost suppression received when bullets are very close to a bot's head.
5. Suppression now depends on the caliber of bullet being fired at the bot. Big Boolet = much more scary.
6. Added extensive config options for suppression (Global Settings => Mind) Most are marked as Advanced Settings. All new settings have full tooltips to explain the system.
7. Added Suppression Resistance for Personality and BotType configs. It is not yet pre-configured, so no bots will have resistance by default.
8. Configuring each tier of suppression is possible by editing the GlobalSettings.json in a custom preset. No GUI for it yet.
9. Added Hearing Distance Multiplier to Suppression Effects

Added Extensive New Config Options

1. Everything is configurable for bot hearing.
2. Added Toggle in GlobalSettings => Shoot to force bots to only use semi auto if desired. (Defaults to off)
3. Added toggles for each bot type and global toggles for different movement options for bots. So you can disable lean, vault, jump, pose adjustment, and prone globally or for specific bot types.
4. Added Power Level Options to Global Settings, these control how different things about a bot affect their power level score, and in return what personality they are allowed to use.
5. Added Time and Weather config options for vision and hearing.
6. Added several new advanced config options for bot steering.
7. Added config option to change what personality bosses are assigned. (Found in GlobalSettings.json in a custom preset, no GUI yet)

GUI Reworks

1. Settings menu is now more condensed to allow more options.
2. Slight adjustments to the dimensions of everything to improve readability and consistency.
3. Added Toggle on the top bar to enable/disable advanced settings.
4. Added a ton of new descriptions and proper names for config values. Almost all global settings have explanations now.

General Improvements

1. Added .json file to match nicknames with specific personalities. (Generated on game launch when sain is installed)
2. Enable Extract Global now swaps between SAIN extract and Vanilla extract systems. Defaults to Vanilla.
3. Bots now have more difficulty hearing suppressed gunfire.
4. Bots now sprint when possible when under fire by someone shooting from long range. (Can be toggled in Global Settings => Mind.

Fixes

1. Fixed some vanilla combat layers still being active for PMC AI.
2. Fixed guns not firing if returning from a raid and entering the shooting range.
3. Fixed Bot hearing not being affected by stun/flash grenades.
4. Disabled several loggers from activating unless SAIN Debug Mode is enabled.
5. Fixed SAIN Server mod showing incorrect version.

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Solarint added a new version:

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Grenade Indicator 1.0.2

SPT 310+ Only
Changelog:
Updated to work for SPT 310.
Virustotal Results: https://www.virustotal.com/gui…821671af1832ab2d91f03a5b4

Solarint

Dec 7th 2024

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SPT 310+ Only
Changelog:
Updated to work for SPT 310.

Solarint added a new version:

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Headshot Damage Redirection - HDR 1.3.1

Updated to work with SPT310, will not work for older versions.
Virustotal Results: https://www.virustotal.com/gui…8c989ca9d1e20ba79b30ea0db

Solarint

Dec 7th 2024

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Updated to work with SPT310, will not work for older versions.

Virustotal Results: https://www.virustotal.com/gui…8c989ca9d1e20ba79b30ea0db

Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 3.2.0

SPT 3.10+ ONLY


Full credit to @Lacyway for getting SAIN working with SPT 310!
Note: Apparently Virus total thinks SAIN is "Pornware". So consider this the official porn update!
https://www.virustotal.com/gui…2ccd4000ecbac59/detection
Changelog:
Solarint:

• Added new config options for customizing bot sound position estimation, or how accurate they are at locating the source of heard sounds. Found in Global Settings => Hearing
• Added new styling and design for some GUI visuals.
• Added categories to

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Solarint

Dec 6th 2024

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Full credit to @Lacyway for getting SAIN working with SPT 310!
Changelog:

Solarint:

• Added new config options for customizing bot sound position estimation, or how accurate they are at locating the source of heard sounds. Found in Global Settings => Hearing
• Added new styling and design for some GUI visuals.
• Added categories to settings folders to improve organization (wip)
• Added toggle at the top of the SAIN GUI to enable/disable advanced settings.

Lacyway:

• Updated for SPT 310.
• Zombies are now ignored by SAIN, and should be working properly.
• SAIN hit reactions are now off by default until Solar / new developer can take a look at them (they are known to cause issues)
• Fixes to improve Fika/SAIN compatibility.
• Add sandbox_high to locations (Fixes: #9) by @ArchangelWTF in #10
• Added new ammo calibers
• Added new missing guards for Kaban
• Added Partisan to bot types
• Merged PR from DanW fixing nullref (other one was skipped as it was causing side effects)

Solarint added a new version:

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SAIN - Solarint's AI Modifications - Full AI Combat System Replacement 3.1.0

SPT 3.9 ONLY
Changelog

Solarint

Aug 4th 2024

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SPT 3.9 ONLY

Changelog

Solarint added a new file:

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Bullet Crack Fix

Stop bullet cracks when they shouldn't happen.

Solarint

Jul 30th 2024

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Bullet cracks will no longer play if the shot is behind an object and the object is far from the player.
Hasn't been tested in every situation, but it seemed to be working as it should.

Solarint added a new file:

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Grenade Indicator

Spot grenades and track where they go with ease.

Solarint

Dec 7th 2024

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Bad grenade audio got ya down? Want to see the impact grenade headed for your face before it kills you? Well you've come to the right place!
Video Showcase:
Video
Adds a UI indicator for grenades that are active near you.
Has options to require Line-of-sight on the grenade,
Has options to enable pretty trails to watch grenade arcs. (Disabled by default)
Has a few preset colors and the ability to set the color to whatever you want!
Unknown if it works with Fika.

Known Issues:
UI will flash for a single frame if out of range but still within range to be tracked, or if the LOS is blocked and that option is enabled, will be fixed in next build.

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Solarint added a new version:

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Headshot Damage Redirection - HDR 1.3

SPT 3.9.0+ only.

Added option to only redirect based on a random chance roll.

Added option to spread damage to multiple body parts.

Added optional damage multiplier, so you can increase the damage received that gets redirected. Intended for use with multiple parts selected.

Solarint

Jul 27th 2024

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SPT 3.9.0+ only.

Added option to only redirect based on a random chance roll.

Added option to spread damage to multiple body parts.

Added optional damage multiplier, so you can increase the damage received that gets redirected. Intended for use with multiple parts selected.