Hands/Feet Flickering Fix

SCREENSHOTS
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AI Disclosure
This ASI mod was made with AI. The research, reverse engineering, and code were produced by Claude, Anthropic's AI model, in a conversation with me. I directed the work, supplied the game files and test data, tested the results in game, and reviewed the code. See the linked GitHub repository down below for more information.

While I have tested this extensively and am very confident it will not blow up your game, I believe in transparency for mods developed heavily with AI so downloaders can make an informed decision. Additionally, I encourage other modders/coders to take a look at the source for themselves. The whole mod is about 340 lines of C++, and the fix itself is only about 30 of them. Finding the bug, however, required heavy disassembly of the game's executable.
Please note that an ASI loader is required for this mod to work. See below if you need more details on how to obtain one.

Since the inception of custom sliders, limb flickering has always plagued those of us who like making use of heavily resized hands and/or feet. Coupled with mods like NRaas that allow for slider multipliers, the issue can become even more significant and distracting.

This is an ASI mod that corrects a math bug in the game's limb inverse kinematics solver. Now you can give your Sims flippers for feet and orc-sized hands to your heart's content, without having to worry about their limbs jittering or flickering wildly.

Tested to be compatible with both patch 1.67 (Steam/Retail) and 1.69 (EA App). Should essentially never conflict with any other ASI or script mods.

How to install:



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GitHub Repository
You may view the source code for this ASI mod, as well as the full write-up of how it works and detailed documentation here: https://github.com/thesammy58/LimbIkScaleFix/


Credits
Just Harry, for finding that turning off RenderLimbIk stops the flicker, which pointed the search at limb IK functions. sims3fiend and the Sims 3 Settings Setter contributors, whose settings editor exposes the engine's RenderLimbIk and Smooth Animation settings. Sage, NikSim, leWing, Jonha, Pcfreak and Bloom, whose sliders were examined to work out which kinds of sliders trigger the bug. The kind testers in LazyDuchess' Discord server.
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