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"

Light map building error


I'm really new to unreal engine and I have a problem. When I'm trying buliding the light map for my scene I get an error and the building stops. So far I couldn't identify the problem. Id someone knows what is the problem and how to fix it I would appreciate the help. I'm linked a picture with the error text.

Thanks for the hellp and happy holidays.alt text

Product Version: UE 4.10
capture.png (1.3 MB)
more ▼

asked Dec 25 '15 at 01:00 PM in Rendering

avatar image

3 1 2 3

(comments are locked)
10|2000 characters needed characters left

2 answers: sort voted first

Hi LordBaluka,

As the error suggests you have run out of memory while building your scene.

Have a look at a Troubleshooting and Tips guide I put together for Lightmass/Swarm Agent a while back: https://wiki.unrealengine.com/Swarm_Agent_Troubleshooting#.22Ran_out_of_Memory.22

This will have some tips for reducing the lightmap resolutions of your foliage, or disabling foliage lightmaps all together. It will also detail some other things that can help improve your light build times and solve your issue.

  • The biggest thing here would be to make sure you have a lightmass importance volume around your playable areas, You can use more than one.

  • Decrease the lightmap resolution in the foliage tool for all your foliage meshes. Use either 8 or 4 for the resolution.

  • Reduce the number of foliage instances, as these can add up quickly for lightmass calculations and texture pool.

  • Disable Lightmaps on meshes that may not need them, like grass or flowers or anything that needs to move dynamically, since precomputed lighting would never be accurate in this case.

  • If you're still getting the lightmass crash with "Ran out of Memory" error you may want to add additional RAM to your PC as light builds and the calculations needed to create the textures can be intensive depending on your the number of meshes, size of the map, and lightmap resolutions.

I hope this helps.


more ▼

answered Dec 30 '15 at 05:42 PM

avatar image

Tim Hobson ♦♦ STAFF
48.9k 886 99 875

(comments are locked)
10|2000 characters needed characters left

Thank you for your help I'm going to try these methods as soon as I can. :)

more ▼

answered Jan 03 '16 at 09:31 AM

avatar image

3 1 2 3

(comments are locked)
10|2000 characters needed characters left
Your answer
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