GlTF import experiences indexing issue.

[ikeough]

Describe the bug The provided screen shot shows an imported model experiencing what appears to be an indexing issue.

Expected behavior Imported models should not having indexing issues.

Screenshots

Desktop (please complete the following information):

• Mac OS
• Chrome (latest)

Additional context Add any other context about the problem here.

Perhaps related to the indexing issue, the normals for large chunks of this model are inverted. This causes the SSAO to be incorrectly calculated, showing the grid as part of the SSAO.

[ikeough]

Sink model attached: sink.stl.zip

[ikeough]

@andrewheumann Out of curiosity, the model above does not seem to show the same sink basin, and the faucet seems mis-aligned. Did you need to edit the stl to make those changes, or is a bunch of stuff from the stl just not showing up? Here's what the stl looks like in mac preview.