UE - Unreal Engine
Prepare your Unreal 4.27 package
Developer resources and tips on how to prepare, optimize, test and package your Unreal 4.27 project.
Why doesn't my Unreal stream fill the viewport?
So you have an Unreal 3D project uploaded to the PureWeb Reality Platform and streaming in your customized web client, but the stream doesn't fill the entire available space of the browser window.