Steps to building/packaging an archviz walkthrough?

So Ive managed to make an archviz walkthrough & when I play the level after packaging, there’s no textures on any of the geometry. Do I need to be dealing with Visual Studio & compiling a UE4 project before packaging? I’m a little confused on the right steps/oreder of operations as I thought it was build in UE4, then package, then play it. Any help would be appreciated.

Is this a Windows x64 build?

It is though I think Ive found the answer, I might be out of texture memory. When I strip out all of the furniture & just export the shell of the house it works. Its weird because I thought with a gtx 1080ti I would be able to have a single floorplan with furn run good without having to optimize too much. Maybe not…