Implement True Ray Tracing for Lighting, Reflection, and Refraction Throughout Cockpit Interior

In the current simulator, cockpit lighting and reflections—especially on windshields—are calculated using simplified shader effects that often produce unrealistic visuals. Surfaces such as interior walls, upholstery, dashboard, and flooring lack accurate light interaction. Light appears to behave unnaturally, sometimes reflecting through solid geometry, or causing glass to look like an empty, translucent void with fake dirt overlays rather than a physical material.

I propose implementing true ray tracing (RT) techniques throughout the cockpit—not only on canopy glass, but across all interior surfaces. This would include both reflection and refraction for transparent materials, and physically-based lighting interactions for opaque ones. Glass would behave like real glass, with defined optical properties and proper light scattering.

With modern RT technology becoming widely available / for several generations / now on many various GPU families, users should have the option to enable advanced cockpit rendering—even at the cost of some performance. The payoff would be dramatically improved immersion and realism!

Feature Suggestions:

  • Add a graphics setting toggle for “True RT Cockpit Lighting”
  • Apply ray-traced reflections to dashboards, walls, carpeting, seats, and all internal materials
  • Simulate refractive properties for transparent surfaces (glass, gauges)
  • Ensure physical occlusion and accurate light bouncing (no reflections through solid fuselage)
  • Optional slider for RT intensity and quality

Why It Matters:

  • Unprecedented immersion for users, especially in VR
  • Physically plausible light behavior, removing visual inconsistencies
  • Elevates the cockpit from flat shader-based visuals to a tactile, realistic space
  • Glass feels like real material, not a translucent placeholder
3 Likes

I agree. My 3090 Ti might not be able to achieve 10 FPS in 4K Ultra with true Ray Tracing enabled. But I’d like the chance to try.

By the time this is added to the game, you’ll definitely need to upgrade your video card. I just started the poll, and I think it will take at least six months to a year to get enough votes, but by the time it’s added to the game, it will be two to three years. That is, if it’s added at all. It would certainly bring about a spectacular change in the cockpit, especially in the evening or at dusk, but also during the day! Anyway, I don’t think it would put that much strain on the your video card With DLSS! /10fps/

1 Like

I want RT. I do. And in reality I think my GPU would do well enough.
Like all the other “nice to haves” it should be an option that adds to the sim, but can be disabled if it impacts performance too much.

That’s obvious!
I thought so too!
I don’t think many people are really interested in this. Maybe I’m interested because I’m a 3D modeler and I know how much a feature like this means in terms of visuals! Especially in a cockpit! Video cards 2-3 generations older wouldn’t be able to handle this well, I know, but the next generations would definitely run very well. This wouldn’t be important for the current capabilities, but for the future.. It’s a shame that simulator fans don’t want to simulate real lighting effects! It’s a bit controversial.

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In my case it all comes down to how much work my 7950X3D can be assigned, versus how much my 3090 Ti is assigned.

Right now my CPU is about 30% utiliized, while my GPU is about 98% utilized.

I’m clearly GPU-limited. Adding RT processing to my GPU would cripple it I’m afraid.
We need the sim to use our multi-core CPU’s more effectively. Maybe SU4 is a step in the right direction. Still a long way to go, IMHO.

What I wrote was displayed incorrectly, so I deleted it. Below, in a new post, I wrote what I originally wanted.

Yes, I hope so too, it will use more CPUs in the future, it would be nice if the simulator could use everything! I have a Ryzen 9900X and a 4080, but as I wrote, I’m also working on it, I need the 12 cores. However, I really like Flight Sim 2024 and 20, and I just want to see the cockpit in such lighting conditions in the future as if I were really there. For example, with an RTX 6080 card, in 2-3 years. Although, this may just be a dream.