Hi @witawat57,
It's not currently possible to control what layers get pushed to the 3D PCB. I'll add this as evidence for the need for this feature.
Let me know if there's anything else I can do for you.
Best Regards,

Jorge Garcia
Product Support Specialist for Fusion 360 and EAGLE
Kudos are much appreciated if the information I have shared is helpful to you and/or others.
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