It appears that Alembic caches do not influence Lumen's indirect lighting (except for shadowing).
Alembic geometry caches should influence lighting in Lumen as any other geometry in a level.
I have attached an example project and video that illustrates the issue. In the video there are two Cornell Boxes. The balls in the left box are coming from alembic caches. The balls on the right are animated in UE in sequencer for comparision.
Feel free to contact me with any questions.
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-139840 in the post.
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Component | UE - Graphics Features - Lumen |
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Affects Versions | 5.0, 5.1 |
Target Fix | 5.6 |
Created | Jan 20, 2022 |
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Updated | Oct 18, 2024 |