Exporter

Why can't I see the Exporter panel?

The Exporter panel will only be displayed when an Armature object is selected in 3D View.

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Why doesn't my exported file include textures even though I checked "Embed Textures"?

FBX

Please ensure your material nodes only contain Principled BSDF and necessary texture nodes, otherwise the export format and game engines may not correctly recognize or import your textures.

For more details, refer to the Blender Official Documentation - Import & Export of Node Shaders

GLTF

Please try connecting your materials with Principled BSDF and necessary texture nodes, or refer to the more detailed Blender Official glTF 2.0 Documentation