Keep your base mesh clean first—start with a quad grid, then add the displacement modifier. When you bump the noise, lock the subdivision so the edge flow stays intact. If you need more detail, let the displace act on a second, higher‑density mesh that you unwrap separately, then merge it back with a multiresolution modifier. Remember: never let a single non‑manifold edge sneak in; check it before you apply any extra noise. And if the loops still go crazy, just retopologise that noisy patch before blending it back. That’s the only way to keep the mesh breathing without sacrificing control.

If you want that glitchy scream, insert a small random offset to the displacement map—just a few percent—and then immediately run a quick manifold check. That will give you controlled chaos, not a mess that breaks your edge flow. Then you can retopologise the affected area before you merge it back. That’s how you keep the geometry from taking over the party.