Heres an example of UV coords.
[
{"name":"texcoord0","type":"float32","count":2,"data":
[
0.0,0.0,
1.0,0.0,
1.0,1.0,
0.0,0.0,
1.0,1.0,
0.0,1.0
]
}
]
The UV stream will not be shown in the models properties , they can be used in the shader. Like shown here - Lightning VFX how its was made