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Splitting levels to solve 2GB FMemory Limit

Hi I am working on a project using Multi-User Viewer Template (4.22.3) which has 2 Lighting Scenarios in it. Currently I am having the FMemoryWriter does not support data larger than 2GB issue and based on inputs I’ve read online, many suggest the solution to this is to split the level into sublevels.

My question is :

In World Settings > Lightmaps, I noticed my GeometryMap level (where most of my meshes are) has 0 lightmap, while my Lighting Scenario levels have around 200 lightmaps each. So in order to prevent it from exceeding 2GB limit, do I split the GeometryMap or Lighting Scenario level into sublevels? How does it works and how to solve this issue for project with lighting scenarios?

Thanks in advance.

after spliting the level into sublevels, you have to build again. bcoz baked lighting information lost. imo spliting is for geometry, lightmap is not related to FMemoryWriter does not support data larger than 2GB.