June 9, 2026

NPC Family Genetics Fix is Live!

I've got a new mod out today that's a little different from my other appearance-related tools.

NPC Family Genetics Fix addresses something that's been bugging me about the game's townie creation: auto-generated NPC families where the kids look nothing like their parents. Different skintone, different hair color and texture, completely unrelated features. The game has a perfectly good genetics system, it just doesn't use it when generating homeless NPC households. Why?

This mod applies the game's own genetics to children in spawned families automatically, blending skin tone, hair color and texture, and eye color from the in-household parent or parents. It runs on spawn so new families come in with proper genetics, and an optional one-time cheat command cleans up any families already in your save.

A few things worth knowing:

  • Only homeless NPC households are affected. Sims living in homes are never touched.

  • Sims born in-game via pregnancy are excluded, only auto-generated households are affected.

  • Already scanned/processed Sims are tracked so genetic fixes are never reapplied.

It's a quiet mod but one that makes the world feel noticeably more believable once it's running. Download it free on CurseForge!