Best import settings for a unity prefab/FBX file

I wanna see how cool looking I can get an old 2022 unity project looking in UE5.
It’s a full prefab with lights, volumes, scripts etc.

I’ve opened unity and deleted as much as I can find that isn’t just a 3D asset, texture or object, which should essentially just leave me with a textured, meshed level with walls, buildings etc.

Using the Unity FBX exporter tool, I’ve converted the leftovers into an FBX, then imported into Unreal.

When importing though, i’m new to UE and havent touched Unity since 2022 so i’m stumped on what settings I need.

At the end, I want:

  • The imported unity texture (I will later replace with quixel bridge textures)
  • Imported 3D models/assets
  • Collision on all walls and buildings etc

I’ve tried just random settings when importing and I always end up with one or more of these problems whenever I import:

  • The entire prefab is one big collision box
  • Nothing has collision
  • Everything has collision, but I cannot mass-enable nanite on all meshes, that option isnt there on the property matrix

I don’t need the collision that already exists in Unity if UE is able to just auto generate it properly.
Does anyone have advice on what I need to be doing? I could also be exporting it with the wrong settings on Unity too and i’m just not realising,.

Tried finding a solution for this on youtube but the only thing I could find was a tutorial for importing a default Unity Asset Store project to UE4 which didn’t help me here.