Thanks for reaching out. If you're having technical issues I suggest searching the Cesium community forum for answers or posting your question there. The community is always eager to help out. community.cesium.com/
Unfortunately, Google Photorealistic 3D Tiles are limited to streaming only at the moment under Google's terms of use. We understand a lot of users would like to use this in an offline capacity. Right now the best course of action is to let Google know you're interested in this, through the "send feedback" button on this page: developers.google.com/maps/documentation/tile/3d-tiles
So I can export the whole world to unreal? Can you guys have a game dev do a full tutorial, can we download the google maps and use it for a game without needing to stream it?
Unfortunately, Google Photorealistic 3D Tiles are limited to streaming only at the moment under Google's terms of use. However, it couldn't hurt to let Google know you're interested in offline use, through the "send feedback" button on this page: developers.google.com/maps/documentation/tile/3d-tiles