There is a proud tradition among PC gamers of discovering that a visual feature costs frames, concluding it looks basically the same with it off anyway, and turning it off.
The tradition is largely honourable. Chromatic aberration is pointless. Motion blur can be actively hostile. Depth of field that doesn’t respond to eye tracking can get in the bin. The judgement that you’re paying for something you’re not getting has a good track record.
On ray tracing, the judgement is wrong. It’s confidently, persistently, collectively wrong, and it’s worth taking seriously enough to explain why, because the stakes are higher than your current frame counter suggests.
To understand what ray tracing actually does, you first need to understand what the alternative actually involves. Rasterisation, the rendering technique that has driven real-time graphics since the mid-nineties, has a fundamental limitation baked into its architecture: it doesn’t know where the light goes. It knows where the light sources are. It can compute direct illumination, meaning surfaces directly struck by those sources, with reasonable accuracy.
But real lighting doesn’t stop at the first surface it hits. It bounces off walls and bleeds colour onto adjacent surfaces. It fills rooms with soft, indirect illumination that makes the difference between an environment feeling physically real and an environment feeling like a very convincing set. Rasterisation cannot compute any of this, because calculating the path of a light ray requires tracing it through the scene, and tracing rays in real time at any scale was, until hardware-accelerated ray tracing arrived, simply not viable.
What rasterisation does instead is fake it. Systematically, expensively, and at enormous ongoing cost to the teams building the games.
Image credit: Nvidia
Lightmaps are baked textures encoding lighting at a single frozen moment, computed over hours of processing time and locked permanently into the scene. Change the geometry, alter a material, move a light source: bake again. Reflection capture probes are scattered manually throughout every environment, taking static snapshots of what a reflection should look like at specific points in space, hoping the player doesn’t move in a way that exposes the lie.
Fill lights, invisible light sources that exist purely to simulate bounce lighting the engine cannot calculate, are placed by hand across every environment. Dozens of them. Sometimes hundreds. Someone put each one there. Someone tuned its colour temperature and falloff. Someone checked it didn’t produce ugly results when the player approached from an angle that wasn’t tested.
This is not a small operation. It’s a permanent fixture of game development under rasterisation, a continuous cost in artist-hours, production time, file size, and build complexity that compounds with every environment, every weather state, every time of day a game needs to support. The best teams produce fake lighting so accomplished that you’d never question it. That doesn’t mean it isn’t fake, and it doesn’t mean it isn’t expensive.
Ray tracing, and its more complete implementation path tracing, replaces the entire apparatus with physics. The light does what light does, traced through the scene with physical accuracy. Bounce lighting emerges from the simulation rather than from an artist placing invisible sources and hoping. Reflections are live and correct rather than captured and approximately plausible. Indoor illumination looks like it’s produced by the light sources visible in the scene, because it is, because the engine is finally simulating what those sources actually produce.
The quality difference this produces isn’t subtle once you know what to look for, and it’s most visible in the places rasterisation has always struggled most: interiors.
Cyberpunk 2077‘s path-traced Overdrive mode, which has evolved from technology preview into a polished shipping feature as the game has continued to receive updates, is the most legible demonstration available. The gap isn’t in the reflections, where most comparisons start and stop. It’s in the rooms. Apartments lit by practical light sources, ceiling fixtures, lamps, neon from outside the window, look in standard rasterisation like they’re being lit by those sources with invisible assistance.
In path tracing they look like they’re actually lit by those sources, because the indirect illumination is calculated rather than approximated. Surfaces catch light the way surfaces catch light. Corners receive the ambient fill that real corners receive. The uncanny quality that slightly upscale game environments often carry, the sense that something is technically correct but not quite physically right, disappears.
Image credit: MachineGames
Indiana Jones and the Great Circle, built on id Tech 8 with path tracing integrated from the start, produced the best interior environments of any game in 2024. Torchlight behaving like torchlight in stone chambers. A single candle illuminating a space without looking like it’s been supplemented by an invisible lighting rig. Shadows in spaces designed to feel ancient that actually behave like shadows rather than dark textures. None of that required a lighting artist placing fill lights and baking results. The physics produced it.
Alan Wake 2 committed to path tracing so thoroughly that the game’s visual identity is built around it. The atmospheric quality of the forest lighting, the way artificial sources in the Dark Place produce illumination that feels genuinely uncanny rather than engineered, the wetness on every surface reflecting the scene correctly rather than sampling a static probe: it’s a game that demonstrates something no technical explanation quite conveys.
Path-traced lighting doesn’t just look different. It looks correct. There’s a quality to physically accurate illumination that the eye recognises without being able to articulate, in the same way you can identify a real location from a dressed set without being able to say exactly which detail gave it away.
Now here is the part that the “just turn it off” crowd hasn’t reckoned with properly, because it isn’t about their frame rate at all.
EA Sports F1 25 shipped with a path-traced Ultra Max quality mode on PC. It looks exceptional for the series: carbon fibre reflecting the pitlane correctly, shadows under barriers behaving like shadows rather than dark decals, late afternoon light at Monza falling on the grandstands with a quality that approaches broadcast footage. The how of it is where things get interesting.
At GDC 2026, Principal Engineer Tom Hammersley presented on exactly this subject. The headline figure is one you’d need to hear twice. Two senior engineers built a path tracer on EGO, the bespoke engine that has powered EA Sports F1 titles for over a decade, without changing a decade of existing art. They shipped it in twelve months.
Two engineers. Twelve months. No art pipeline changes.
Sit with that for a moment. The lighting quality you’re looking at in F1 25’s Ultra Max mode, the most realistic illumination the series has ever had, was produced by two people in a year, dropped onto a ten-year-old engine, without requiring any artist to touch the existing art.
Image credit: Codemasters / Compusemble
The equivalent quality improvement delivered through traditional rasterised means would have required a team of lighting artists working across every track, every surface condition, every time of day, placing and tuning fill lights, rebaking lightmaps, adjusting reflection probes, and doing it again every time anything changed. That work compounds across the franchise’s annual release cycle. Path tracing eliminates it at source.
This is the argument that tends to get lost in discussions about ray tracing that begin and end with performance benchmarks. The gamer’s perspective on ray tracing is a frame budget calculation. The developer’s perspective is increasingly a production budget calculation, and that calculation is arriving at a different answer than most players currently expect.
The performance argument against ray tracing is real and isn’t being waved away here. Running a full path tracer demands more from current hardware than rasterisation does, and the games implementing it best universally depend on DLSS or FSR to deliver acceptable frame rates. F1 25’s Ultra Max mode is designed for high-end hardware with AI upscaling carrying a substantial portion of the load.
But the trajectory matters more than the current position. GPU hardware ray tracing performance improves meaningfully with every generation. DLSS has reached a point where the upscaled output at quality presets is broadly indistinguishable from native on most displays by most users. Frame generation has changed the performance headroom available to demanding rendering techniques in ways that would have seemed implausible three years ago. The cost of physically accurate lighting falls every time a new GPU generation ships, and it’ll be lower still in 2028 than it is now.
The studios aren’t doing this because it’s fashionable. They’re doing it because two engineers in twelve months is a better outcome than an entire lighting team for six months
More importantly, the development efficiency case compounds in the other direction. Every year of rasterised lighting is another year of baked lightmaps, manually placed fill lights, and reflection probes to maintain. Every game that adopts path tracing early recovers that cost across the production cycle. The studios aren’t doing this because it’s fashionable. They’re doing it because two engineers in twelve months is a better outcome than an entire lighting team for six months, and because a physically correct renderer that handles new content automatically is worth more over a five-year production cycle than one that requires re-lighting every time anything changes.
The “just turn it off” instinct made sense when ray tracing was a half-implemented hybrid bolted onto an otherwise rasterised pipeline at substantial cost for marginal visible gain. That era is ending. The games being built right now, on engines being architected right now, are increasingly treating physical lighting as the foundation rather than the optional extra. By the time path tracing is the norm on mainstream hardware, the body of work built assuming it will be available will be substantial, and the visual quality gap between those games and the rasterised generation before them will be impossible to dismiss.
PC gaming has the hardware. It has the drivers. It has the first-mover advantage on every technology that eventually becomes standard. Ray tracing is following the same arc as any disruptive rendering technology: expensive and exotic first, mainstream and expected later, retroactively obvious by the end.
You’ll turn it back on eventually. Better to pay attention now.
Related: The DLSS “Fake Frame” Fallacy | GPUs Are Too Expensive and We Need to Talk About It