… your pc specs have little or nothing to do with it (however if you plan on using world creator / tiles in your project, i suggest you snag more ram. Max it out).
I honestly cannot tell in this view if this is a case of flipped normals or not.
but it does sort of look like it.
put the shoes in blender and enable the normal view. If they are pointed outside, than the next thing to look at is the material.
Now, while im at it. If those are flipped normals. What is the purpose of having 2 layers on a character shoe other than adding a lot of weight to it? None… no one will ever see the inside. I would suggest removing it.
Less poli = better product = better performance.
Btw, if you higheight the shoe material in unreal and zoom in you may be able to see if the normals are flipped. The outline will be present but the surface won’t be visible.
you can make the material double sided, but you really should fix your normals if they are it.