Glitchy/transparent surfaces after importing to Twinmotion from Rhino 7. (MacBook Air M1)

as an alternative fix, you can select the material that is applied to the surface geometry, and turn double sided material on. this usually fixes the issue (apart from a few cases in models coming from archicad for example).

https://capture.dropbox.com/l37CvJSBlkdmgDSF?autoPreview=1