Specifically, ray tracing and colour grading can be added to make the engine shine like in the UE5 demo, which is exactly what Massihancer has shown in their latest graphical mod for the UE4 demos.

Use Unreal Insights to collect, analyze, and visualize data on UE4 behaviour for profiling, helping you understand engine performance from either live or pre-recorded sessions.

Meanwhile, Nvidia talks about ray tracing under water scenes in DXR.

Ray tracing is a rendering technique for photorealistic graphics by simulating refraction and reflection of light. In other words, it makes light behave in video games like it would in real life.

UE4 has been integrating ray tracing for quite some time -- this functionality isn't dropping in out of the blue -- but it's a necessity to any push to see ray tracing in more titles.

Ray tracing is a technique that makes light behave in a realistic way, which makes video games more immersive.

"No, we are not going to have ray tracing when the game launches, and we don't have any plans in the near future for it ...

Ray tracing and path tracing are two advanced lighting effects that are making modern games look amazing, but which is better and how do they work?