We disabled DFAO on our project (using r.DistanceFieldAO 0) to replace it with Lumen occlusion, as the combination of both was creating dark blobs under bushes and grass. However, we noticed disabling DFAO removes the landscape from the Global Distance Field, which has other side-effects such as the landscape not contributing to the Lumen scene. This is easily reproducible in a test map in vanilla UE5.2/5.3 (see screenshots below).
Is this behavior intended? Is there any way we can bring back the landscape in the GDF without DFAO?
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-197572 in the post.