“Export Selection…” (.obj exporter) doesn't export large chunks of maps when exporting very large terrains

[144hertz]

When using the Roblox Studio explorer’s “right click” → “Export Selection…” .obj exporter, if your terrain is larger than a certain size, the export misses large chunks of the terrain.

It appears that the max file size of an export is limited to ~2.07 GB, and if your exported terrain would surpass this, chunks are instead discarded. When we remove sections of terrain and export again, sections that were once missing come back.

This makes attempts to use our map in external programs, such as for the purpose of making rendered thumbnails or for rendering minimap images unnecessarily frustrating as we must cull the terrain to small sections for each export, instead of being able to have one large “master file” of the entire map that we can work from.

Also, please note this thread from 2022 describes the same issue:

Trying to export large map as a 3D model, but most of the map is missing

I’m trying to export a large map, including the terrain, as a 3D model (.obj). When I try to do this, the resulting .obj file is 2.1GB. It understandably takes ages to load in Blender, but when it does, most of the map is still missing. The terrain appears to have many “tiles” missing. Huge swathes of it just aren’t in the obj file. As for the parts in the build, loads are missing, entire sides and contents of buildings just aren’t included. Is there a maximum number of triangles when exporti…

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