I noticed that the error is present when exporting from ArtLantis 2021 in the skp format, and opening skp in the ArchiCAD 24 program.
Textures also disappear in ArchiCAD, which were superimposed on transparent materials in Artlantis.
But in ArchiCAD cannot be done opaque these textures, unlike sketchup.
So the error is not in Sketchup, but somewhere when exporting to skp format…
Please check this, and now it is not possible to fully enjoy export from Artlantis in ArchiCAD and Sketchup.
