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Delete old lightmaps from umap?

Hi
does anybody know a way to delete old lightmaps from the world / map file?
Each time I rebuild my light the lightmap count in the world settings increases and the umap file grows and grows…

Lightmap.png

Cyxx

Now I was able to delete the old lightmaps.
The solution mentioned here didn’t work for me (with 4.13) in the first step:
https://answers.unrealengine.com/questions/138359/clear-lightmaps-in-level.html
I had also to restart UE to get rid off the lightmaps.
So for anyone searching how to delete:

  1. Set “Force No Precomputed Lighting”
  2. Build Lighting
  3. Restart UE

Yep, that’s how it’s done

Hi ! it’s easy to delete the light information… Every map has a "Build Data’ or Map Build Data Registery and you can find it in a the parent of you map folder. If you delete that, all the light information will reset!