PLEASE HELP! UE4 Crashes after building lighting

Development Rendering
1

UE4.14 crashes immediately after completing lighting build on my project. I have literally tried everything to think of:

  • I have updated graphic card drives
  • Cleared the cache of Swarm agent and reset
  • Changed all meshes to static
  • Deleted objects that aren’t present in the scene.
  • Reduced light map resolution significantly to any objects instanced

Also it builds the lighting in new projects fine.

PLEASE HELP THIS IS FOR MY UNIVERSITY COURSEWORK!! link text

2

Hey User-645081948,

What you might want to try is to delete your Saved, Intermediate, and Config folders within your Unreal Projects directory. Be sure to make a copy of these folders first before deleting them. Once you have deleted the folders/files, restart your project and try rebuilding your lighting.

Let me know if this resolved your issue, or if you have further questions.

Thanks,

3

Thanks for the comment however the project is still crashing on importing lighting build

4

In that case, I need steps to reproduce the crash on my end in order to report and troubleshoot your issue.

Since the new projects build their lighting just fine, then we can rule out it being an engine issue and more of a project specific one.

Perhaps some context as to how large your scene is, what types of lights you are using, and any other pertinent information that will help me reproduce the crash on my end is going to be helpful.

Let me know if you have further questions.

Thanks,

5

The scene scale is very large, as it utilises Unreal’s instancing systems & LODs.
As its crashing now on importing the build.

One of the concerns if I am using the foilage system to paint a field of grass and that comes to a million instances however its just uses four planes.
But there are no errors present, fps remains high and memory/cpu are at good levels.

The lighting is nothing complex just a skydome sphere with a directional light and atmospheric fog.

6

Painting up to a million instances and having all of those grass meshes baked into a lightmap/shadow map is going to take a long time. A million instances is a lot, and more than likely unnecessary to achieve the effect you are going for.

I am going to need steps to reproduce the issue in a blank project, and your crash logs in order to further assist you.

Update: Marking this as resolved until the requested information has been provided.

Thank you,