TessellationLevelOfDetail not used?

It seems that exporting either Extra Low, Low or Medium doesn't affect the output.

Low or Extra Low still gives the same file size and no visible change.
The same goes for medium / high (both high, and same file size)

No file, test, or entry point is identified in the issue. Start by reproducing exports at each tessellation level and tracing where TessellationLevelOfDetail is read; done means the selected levels produce the intended observable and file-size differences.

Written by the indexing model from the issue text.