Reprojection or Native Frame Rate: Which VR Experience Is Smoother?

What reprojection means in VR

Reprojection, also called frame interpolation or motion smoothing, is a software technique that creates new frames between the ones the system actually renders. When a VR headset's display runs at a certain refresh rate (for example, 90 Hz), but the game or app can only deliver 45 frames per second, reprojection fills in the missing frames. The goal is to keep the headset's display running at full speed, reducing judder and making motion appear smoother.

Different platforms use their own names for this technique. SteamVR calls it Motion Smoothing, while Meta's Oculus software uses Asynchronous Spacewarp (ASW). On standalone headsets, the operating system may apply a similar interpolation to keep the experience fluid when the processor cannot keep up with the display rate. For a general overview of choosing a headset, see the best VR headset guide.

Native frame rate and refresh rate

Native frame rate means every frame shown on the headset's display was rendered by the graphics system (the PC or the standalone chip) at the exact time it is displayed. If a headset has a 90 Hz display, native frame rate means 90 frames per second are rendered and shown. This is the ideal scenario because each frame is a true representation of the game state at that moment, with no interpolation artifacts.

A headset's refresh rate is a stated detail on its product page. For example, the VIVE Focus Vision lists a 90 Hz refresh rate. A PC VR headset like the Valve Index also has a refresh rate that can be selected in software, though the exact number is not listed on the source page used here. When comparing headsets, the refresh rate tells you the maximum number of frames the display can show per second. Native frame rate requires the rendering system to hit that number consistently. Learn more about the difference between standalone and PC VR headsets.

How reprojection works

Reprojection takes the last rendered frame and uses motion vectors or depth information to warp it into a new frame that predicts where objects should be. This new frame is inserted between real frames. The technique is fast enough to run in real time, but it is not perfect. Because the interpolated frame is a prediction, it can introduce visual artifacts such as ghosting, edge distortion, or a slight mismatch when the prediction is wrong.

Some implementations also use the previous frame and the next rendered frame to create a more accurate intermediate frame, but that adds latency. The trade-off is between smoothness and accuracy. For fast-moving scenes, reprojection may struggle, while for slower scenes it can be nearly indistinguishable from native rendering.

When reprojection helps and when it does not

Reprojection is most helpful when your hardware cannot maintain the headset's native refresh rate but can deliver half of it. For example, if a PC can render 45 fps on a 90 Hz headset, reprojection can fill the gap to 90 fps, making the experience much smoother than running at 45 fps without interpolation. This is common in demanding PC VR games or on standalone headsets running graphically intensive apps.

However, reprojection does not help when the frame rate drops below half the refresh rate. In that case, the headset may need to drop to a lower refresh rate or the interpolation becomes too unreliable. Also, some users are sensitive to the artifacts of reprojection and prefer to lower graphics settings to achieve native frame rate instead. The choice depends on the user's tolerance and the type of content. For PC VR setups, the best PC VR headsets guide can help you find a headset that matches your hardware.

How to check a headset's stated details for this

When reading a headset listing, look for the refresh rate in the specifications. A higher refresh rate (for example, 90 Hz or 120 Hz) gives more room for reprojection to work, but also demands more from the rendering system. For PC VR headsets, check whether the headset supports DisplayPort or USB-C connections that can deliver the bandwidth needed for high refresh rates. The VIVE Focus Vision, for instance, offers DisplayPort mode for a lossless connection to a PC, which helps maintain native frame rate.

For standalone headsets, the storage and processor are fixed, so the refresh rate is a fixed target. The headset's operating system may apply reprojection automatically. Some headsets also support variable refresh rate, which can reduce the need for reprojection by matching the display rate to the rendered frame rate. This is not always stated on the listing, so check the maker's product page for details. The best standalone VR headsets guide lists models with their stated refresh rates.

Choosing between reprojection and native

If you have a powerful PC that can consistently render at the headset's native refresh rate, a PC VR headset with a high refresh rate and a direct DisplayPort connection is a good choice. This gives you native frame rate with no interpolation artifacts. If your PC is mid-range or you use a standalone headset, reprojection can still provide a smooth experience, especially in slower games or apps.

Some headsets, like the VIVE Focus Vision, are hybrid: they can run standalone with reprojection or connect to a PC for native frame rate via DisplayPort. This flexibility lets you choose based on the situation. For console VR, such as PlayStation VR2, the console's hardware is fixed, and the system may use reprojection to maintain smoothness. The stated details of the headset (refresh rate, connection type) are the key indicators of what to expect. For premium options, see the best premium VR headsets guide.

What to pick for your situation

Questions

Does reprojection cause motion sickness?

Some users may notice artifacts from reprojection that can be uncomfortable. If you are sensitive to visual inconsistencies, you may prefer to adjust settings to achieve native frame rate. Always follow the maker's health and safety guidance for your headset. For more on choosing a headset, see the best VR headset guide.

Can I turn off reprojection on my headset?

On PC VR platforms like SteamVR, you can disable Motion Smoothing in the settings. On standalone headsets, the operating system may not offer a toggle. Check the headset's software settings or the maker's support page.

Is native frame rate always better than reprojection?

Native frame rate provides the most accurate motion, but it requires consistent rendering performance. If your hardware cannot maintain native frame rate, reprojection can make the experience smoother than running at a lower frame rate without interpolation.

How do I know if a headset uses reprojection?

Reprojection is a software feature of the VR platform, not a headset specification. Most modern VR platforms include some form of reprojection. The headset's stated details (refresh rate, connection type) indicate whether it can support native frame rate under ideal conditions.

Does a higher refresh rate reduce the need for reprojection?

A higher refresh rate gives more headroom for reprojection to work, but it also demands more from the rendering system. If your hardware can only deliver half the refresh rate, reprojection will still be used. A moderate refresh rate (e.g., 90 Hz) is often easier to maintain natively than a very high one.

What is the difference between reprojection and variable refresh rate?

Reprojection inserts synthetic frames to match a fixed refresh rate. Variable refresh rate (VRR) adjusts the display's refresh rate to match the rendered frame rate, eliminating the need for interpolation. VRR is less common in VR headsets but can reduce artifacts.

Can I use reprojection with a standalone headset connected to a PC?

When a standalone headset is connected to a PC via link cable or wireless streaming, the PC may apply reprojection (e.g., SteamVR Motion Smoothing) if the frame rate drops. The headset's own standalone reprojection is not used in PC VR mode. For more on PC VR connections, see the best PC VR headsets guide.