Hi everyone!

I'm currently working on a custom interaction for The Sims 2, and I’d love to know if anyone here might be able to help — or point me in the right direction.

🎯 What I’m trying to achieve:

A “Fart” interaction that plays only the sound (the classic TS2 fart sound) and the green visual effect.

No original fart animation. The interaction should allow the Sim to keep doing whatever they’re already doing.

Ideally built as an Immediate or overlay interaction, to run in the background without interrupting any current action.

The interaction should appear under the “Bad Habits” pie menu (clicking the Sim → Bad Habits → Fart), without replacing or conflicting with the existing "Bad Habits and Gross Behaviour" mod.

I’ve tried building this in SimPE (setting it as Immediate, editing BHAVs, etc.) but I couldn't make it execute unless it replaced the original animation — and I really want this to be non-intrusive and compatible.

I'm happy to write out any technical behavior or mockups needed. I’ve been experimenting with OBJf and TTAB/TTAS combinations, but I think a more advanced BHAV structure or posebox-style overlay might be required.

💬 Special thanks to @simsample for suggesting I post here — and tagging @simmer22 and @omglo, whose work I’ve seen mentioned in overlay-related threads.
Any guidance, tips, or help would be greatly appreciated — even just confirming if this is doable in the current modding framework.

Thanks in advance for reading — and for keeping this amazing community alive. 💚

Still looking for help!
It’s been a while since I posted this request, but I’m still hoping someone is up for the challenge. I can provide all the animations references, modding details, and testing feedback to make the process easier.

If anyone knows a creator experienced with custom overlays/animations for TS2, please feel free to point them here. I’m really excited to see this idea come to life!