As shown in the image, part of the 3D model appears and disappears. Why does this happen? Could it be caused by having multiple animations inside the GLB file?
By the way, when testing on a smartphone, it seems to occur at certain angles and specific distances.
It looks like the normals on the model are inverted and backwards faces won’t show up unless “Double Sided” is checked on the material.
When I slightly change the viewing angle like this, the mesh appears or disappears—could that also be due to inverted normals?
I followed the steps shown in the video, but I couldn’t get the same result. The normals look fine in Blender.
Also, when I tested the model in my own A-Frame and AR.js app, it didn’t disappear. (Although it looked like there might be some z-fighting in that spot.)
Check out this thread, after seeing the video looks like it’s Frustum Culling.
