So far what I've deduced is that the bug occurs with AMD GPUs, but not ALL of them. Thank you for trying another computer. I'm sorry all of them are AMD.
I'll continue to try and figure out the issue. My current theory is that AMD isn't playing nice with the Render Texture perhaps. Since to my knowledge, everyone can see up to the title screen fine, which isn't being sent to a render texture.
The only thing that makes me uncertain that's the case is that I never got any complaints about "Become Prey 2" only showing a black screen even though it's using a similar method.
The only difference is that I added a second RenderTexture so the text also looked crunchy.
I need to find someone with this issue that I can send some builds to and try and hone in on the bug.