use fabric canvas as texture,click to add decal but two side has the text
Can you explain in a bit more detail what is your issue?
It is because your UVs are identical on both sides of the objects
they need to be different to wrap entirely the mesh for instance
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this mean i should tell the 3D designer to rebuild the gltf? i don not familiar this ,how to express this ,can you give a suggestion
As shown in the screenshot image, i just want one side has the decals,but in fact it show two side
Showing them my answer should be fine 
Basically the UVs are wrong should help them to understand
Hello @wangjia5693 just checking in, was your question answered? 
Hi @sebavan, is there any other way to avoid this rather than redoing the model UVs?
Thanks, Pichou
not that I know of
You need an information somewhere in the attributes to know wheat to draw.
Actually, you can remove the artefacts by using the new cullBackFaces: true setting:
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