Search in
Sort by:

Question Status:

Search help

  • Simple searches use one or more words. Separate the words with spaces (cat dog) to search cat,dog or both. Separate the words with plus signs (cat +dog) to search for items that may contain cat but must contain dog.
  • You can further refine your search on the search results page, where you can search by keywords, author, topic. These can be combined with each other. Examples
    • cat dog --matches anything with cat,dog or both
    • cat +dog --searches for cat +dog where dog is a mandatory term
    • cat -dog -- searches for cat excluding any result containing dog
    • [cats] —will restrict your search to results with topic named "cats"
    • [cats] [dogs] —will restrict your search to results with both topics, "cats", and "dogs"

Lighting needs to be rebuilt, tried almost everything


I have tried to solve this issue for a very very long time now. I have google'd, looked through forum posts, this answer hub, reddit and more yet I haven't found a single solution to the problem.
It's driving me downright insane at this point, so any help would be welcome.

"Lighting needs to be rebuilt (X unbuilt object(s))" message that doesn't go away, even when I rebuild it. This happens for ANY stationary mesh and landscape (using static shadow), regardless of size of if I've added a Lightmass Importance Volume. I have tried opening up an empty map, adding Directional Light and a static mesh (so that nothing would get in the way).
The only error I get after building is under MapCheck where it states that "WorldSettings_1 Maps needs lighting rebuilt".

Different engine versions (all the way up tp 4.16 and 4.17.1).
Making sure SwarmAgent isn't blocked by a firewall (even turned my firewall off).
Opened up SwarmAgent and tried to clean and validate (even though nothing showed up).
Gone to "...\AppData\Local\UnrealEngine" and deleted everything there and rebooted the PC.

Can I really not use anything static at all? Is that really the only "solution"?


Product Version: UE 4.16
more ▼

asked Aug 31 '17 at 04:50 PM in Using UE4

avatar image

8 1 2 4

avatar image Jacky Aug 31 '17 at 05:19 PM

Are you sure the build completes successfully when you build the lights? If so can you please share an empty project with a sample level having this issue?

avatar image TychoBolt Aug 31 '17 at 10:22 PM

It says "Navigation building completed" and then I get the pop-up that says Error "WorldSettings_1 Maps needs lighting rebuilt"

"can you please share an empty project with a sample level having this issue?"

Do you want me to upload it? I mean this happens if I just make a new empty project, place any static mesh into the world (with a directional light set to "stationary") and set the mesh to "static" in Mobility.

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

0 answers: sort voted first
Be the first one to answer this question
toggle preview:

Up to 5 attachments (including images) can be used with a maximum of 5.2 MB each and 5.2 MB total.

Follow this question

Once you sign in you will be able to subscribe for any updates here

Answers to this question