Hi again,
I’ve released version 0.20.2 of the Rhino plugin with a quick workaround. One common problem with transparency is that if you have several transparent faces overlapping each other, they are drawn in an unpredictable order, and the order affects how they look. An especially bad case occurs here with a simple square window. A square is always drawn as two triangles, but it happens here that Rhino puts the triangles in an unexpected order and the two triangles get one in front of, and one behind, the rest of the transparent faces. As a result, it’s obvious that the square was drawn as two triangles, with a clear limit across one diagonal which should have been invisible. In the release 0.20.2, the Rhino plugin tries to make sure that two such triangles are always drawn together.
The next release of VR Sketch itself (not the Rhino plugin part) will likely contain a more general fix that removes all order dependency. It might only work on PC: it might end up being too expensive to use on standalone Quest devices.