Exporter missing shading

Support
1 
exporter = vtkGLTFExporter()
exporter.SetActiveRenderer(renderer)
exporter.SetRenderWindow(renWin)
exporter.SetFileName(filename)
exporter.SaveNormalOff()
exporter.SaveBatchIdOff()
exporter.InlineDataOn() 
exporter.Write()

微信截图_20231110180530
微信截图_202311101805301200×752 102 KB

微信截图_20231110180616
微信截图_202311101806161200×752 106 KB

58b34bb1-5758-419d-bb17-f4b330dd905b.stl (198.2 KB)

vertices or faces seems to be compressed.
Resulting in missing shadows loaded with cesium, here’s a comparison.

微信截图_20231110181141
微信截图_20231110181141626×753 52.4 KB

2

Vexation!
Hope to get a reply.
Thank you very much for your help.