Tutorial: Fix GPU Lightmass Crashes in Unreal Engine 5 – Find Problematic Assets Automatically!

[LarsH]

GPU Lightmass Watchdog – Automatically Detect Crashing Assets During Lightmap Baking

I’ve created a tool and video tutorial to help track down assets that cause crashes during GPU Lightmass warm-up in Unreal Engine 5. The Watchdog monitors the editor, restarts when needed, and isolates problematic assets automatically.

The tool is open source and available on GitHub:

GitHub - LarsH96/GPU-Lightmass-Watchdog-For-Unreal-Engine-5.x: A lightweight watchdog for Unreal Engine 5 that...

You can also watch the full tutorial here:

Fix GPU Lightmass Crashes in Unreal Engine 5 – Find Problematic Assets Automatically!

This should be helpful for anyone working with large or complex scenes where Lightmass is unstable.