[Duke Sweden] ” My question, which I actually came here to ask, is, if I set my timeline to the above setting, and choose 4096×2160 as my render resolution, am I getting a 4096 video, or is there deterioration in quality? That’s all I need to know.”
I actually answered this to you before. If you are setting a higher resolution on export you are upscaling from the timeline resolution. You are losing quality.