Remedy: NVIDIA RTX adds 9.2ms in render time, at 1080p on RTX 2080 Ti

Over at last week's NVIDIA GPU Technology Conference (GTC) Europe 2018, game developer Remedy Entertainment showed off their Northlight engine demo running NVIDIA's RTX technology. While RTX can deliver much better light effects, more and more evidence emerges that the current generation of GeForce cards still isn't powerful enough.

WCCF Tech reports the use of RTX adds 9.2ms in render time to a scene. This is important because if you want to target 60 frames per second, the overall render time can not exceed 16ms. This does not leave a lot of rendering budget for everything else that needs to be computed for a scene. Furthermore, the demo was running on the flagship GeForce RTX 2080 Ti and at a resolution of just 1080p. Especially reflections are pretty performance intensive:

As reported by Golem.de, the raytraced scene delivered clearly higher quality graphics but the expense was rather significant. Between contact shadows (2.3 ms), reflections (4.4 ms, as you can see in the picture below) and denoising (2.5 ms), all of the NVIDIA RTX effects cost 9.2 ms in render time.

Here's the Control demo from two months ago. It uses RTX for reflections, diffuse GI and contact shadows.