Weird model glitch

Sorry if this seems noobish, but i’m new to ue4. I’m making models in blender for someone that is making some fnaf fangame in ue4. I was making sure my model would work in ue4 when I got this weird thing going on in this one part of the model where you can kinda see through the head and other parts of the model

also some things are just not appearing. I’m posting this here because right now the model is static.

Hmm, maybe your normals are flipped?

Open the StaticMesh in the Editor and press the ‘Normals’ button on the toolbar, that will show the VertexNormals of your mesh.