Building lighting via commandlet and via editor are giving different results.
To prevent one method from polluting the other via Swarm cache, the cache needs to be cleared in between tests.
1. Download the Licensee's test project (see addl info URL)
2. Clear your Swarm cache.
`%APPDATA%\Local\UnrealEngine\5.5\Saved\Swarm` and/or `./Engine/Saved/Swarm`
3. Bake lightmaps using the ResavePackages commandlet:
`.\Engine\Binaries\Win64\UnrealEditor-Cmd.exe -project=<path>\bakelight.uproject -run=resavepackages -AllowCommandletRendering -unattended -buildlighting -Quality=High -buildreflectioncaptures -buildtexturestreaming -Map="/Game/SimpleTest/SimpleMap"
4. Open the editor and take a screenshot. (`highresshot 1`)
5. Clear the Swarm cache again
6. Set the Lighting Build Mode in the editor to "High"
7. Build lighting via Build->Build All Levels
8. Take a screenshot of the results (`highresshot 1`)
9. Compare the screenshots from steps 4 and 8. Observe that they are different.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-302151 in the post.
| 0 |
| Component | UE - Graphics Features |
|---|---|
| Affects Versions | 5.5, 5.6 |
| Created | Jul 3, 2025 |
|---|---|
| Updated | Jul 14, 2025 |