In Morrowind, corpses are normally removed after three days. That's bad for "solve a murder" and "recover an item" quests, which is why some corpses are marked as persistent. Otherwise they might disappear before you can discover them.

Unfortunately, there's no way to modify the "corpses persist" flag at run time and let them decay naturally when they are no longer needed. This means those bodies are left in place forever, so you can't claim the house of a murder victim after bringing their murdered to justice... not without having a macabre decoration you cannot remove. Not so good for suspension of disbelief.

This mod attempts to solve that immersion issue by forcibly removing those bodies when they are no longer needed for a quest. It's done via dialog entries: when you turn in a quest, the body associated with it is removed. This way there's no performance impact of an always running global script, and there's no chance a visible body disappears into thin air when you enter a location (unless a quest gives and a body in the same location, which doesn't happen in the vanilla game and most mods).

The mod is fully supported in OpenMW, but the vanilla engine may have issues with modifying objects not currently loaded in the game. See the README for details.