5.2.3p1 Asyncronous loading fix

It does not improve load times for Applications without a splash. The reason that it increases load times for applications with a splash is that previously the Loading of the first Scene didn't start until after the splash screen was over. So you had to wait for the splash to show (Which was about 3-5 seconds) + however long it took your first scene to load.

Now, your first scene loads while the splash screen is showing. So there is no longer a 3-5 second space where nothing is happening but the splash screen being shown.

However, if you don't have a splash in your application, the first scene still won't start rendering until it is finished loading. So for however long it takes to load that first scene, it will just render black.

Something that couldn't be backported, but is coming in 5.3 is the ability to change the splash screen for VR in the PlayerSettings window. The Asynchronous loading will still work in this case and will allow you to show something other than black before your application's first scene.