If you installed MsfsToolkit addon in Blender, check that it is compatible with your Blender version, especially the export to Gltf 2.0 feature. No need to install nodejs anymore, no need to install MsfsToolkit Blender addon. To do so, you have to download the Compressonator tool from GPUOpen. Optional: once your package has been successfully built, you can further reduce its size by using the 'Optimize the built package by compressing the texture files' entry of the addon menu. Reducing the number of texture files reduce the loading time of the scenery, and can reduce stuttering related to texture streaming inside the sim If you use Blender 3.x, you can use the last version. Download version 1.1.x if you use Blender 2.83. Optional: to reduce the number of texture files, you can get the Lily texture Packer. This addon is coded in Python, and sources are available here.

This blender addon is designed to provide tools to help optimizing city sceneries, retrieved via the Google Earth Decoder Tool, made by u/Jonahex111. The reason is that the min LOD determines the size of the tiles, and the size of the tiles from the source scenery must be the same as the one from the destination scenery. About IMPORTANT: for the merge_sceneries script to work properly, the source scenery and the destination scenery must share the same min LOD (i suggest 17).

Blender 2.93 windows 7