EDIT: solution is as follows. 1. Use fullscreen, not borderless window (sometimes the game switches back to borderless window of its own accord, so check for this if problem recurs) 2. Set max pre-rendered frames to 1. 3. Consider using your mouse software to get fast polling rates.

Good evening comrades.

I am curious if any of you have identified tricks to make input super responsive. It appears that FPS in the 30 - 40 range have some mouse lag, despite looking smooth enough. I do have "hardware cursor" ticked.

I am not referring to Geralt's intrinsically cumbersome movement & sense of momentum (nor that of his horse).

At desired graphics settings, I get about 30 - 40 fps, which I would consider quite playable and luxurious, except that there is substantial mouse input lag when rotating the camera.

If I drop the graphics for >60fps, I get lightning-fast mouse response.

Generally it seems that it mouse lag depends upon framerate even when getting an FPS that should be very playable.

Incidentally, up to 200ms input lag is the norm in console gaming, and as such, I don't notice the lag if I am playing with my xbox controller rather than a mouse. If there is no simple fix, this may be an option for gamers wishing to play at ~30fps.

If your hardware supports it, try configuring your mouse to have a higher polling rate. This reduces input latency at the hardware driver level and may improve the performance in a given game unless the game itself has input latency issues inherent itself. Anyone using Logitech mice/hardware with the Logitech Gaming Software can configure the mouse polling rate under the "Pointer Settings" tab in the Gaming Software app, and can set this up as a default and/or per-game. The polling rate can be set anywhere from 125 to 1000 times per second. The higher the polling rate the more system overhead there is mind you, which shouldn't be an issue on any modern computers however older systems might have a noticeable CPU spike when setting the polling interval too high so keep that in mind. Other brands of mice/input hardware may have similar settings in their special software or control panel applet worth checking out as well.

Thanks dude! I actually was playing on a second hand Logitech keyboard and mouse that came with no packaging whatsoever so it never occurred to me that Logitech had optional driver software!

However, I found the real culprit to be PRE RENDERED FRAMES! A setting in the graphics driver. Apparently it renders several frames ahead, thus creating input lag in the interest of modestly increased rendering smoothness. Set to 1 and problem is solved. Hella snappy.

Edit: round three. The real, real, real culprit was "borderless window" mode, for reasons I cannot explain. Keeping max pre-rendered frames as 1, using the Logitech software, and keeping the game in "full screen" rather than borderless window, in combination, resulted in snappy performance.

Paradoxically, setting the reporting rate too high will also cause problems. I had mine set at 1000 reports/second, and it seemed to blow out the input buffer in-game, causing the mouse lag. I found I had best results playing at 125 reports/second. I'm running an AMD FX6300, so am unsure if I was limited by the processor.

Regards,

Cthugha

Thats interesting!
I had a old Phenom II x4 945 @3300MHz
And a Logitech G502. And I can't Play with 1000 Rate, but with 500 I had no problems.

Now I have a FX8350 @4200MHz
and I can't play with a higher rate as 125.
Thats happen only on Witcher 3 (1.12.1)

No other games are have any problems with 1000 rate.