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*Trick* Prerender Limit And Curing The Steering Response Delay/Lag


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#1 DucFreak

DucFreak

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Posted Nov 13 2009 - 04:19 PM

Ok, guys... this a known problem in pretty much any sim, and this is a veeeeery old trick, and one which will not just work with P&G, but with any other game when using a gaming peripheral. :)

With so many newcomers to racesims everyday, and where the controls input need to be delicate and precise, it's always good to remind this old trick, and it goes especially to those that are not afraid to mess with some tweaks (NOTE: use at your own risk, but it's easy to rectify/change/default anyway).


Basically, and to describe what we're correcting... you notice with any sim, for instances with P&G, when using cockpit view (with visible steering-wheel), and even with healthy framerates (+60fps), if you turn your physical wheel (controller) left-right-lef-right very quickly, you'll notice there's a small delay, like slight lag, in the response to that movement (input) looking at the in-game steering-wheel on screen.


The solution is to have pre-rendered frames set at "0" or "1" (default is "3") in your graphics-card driver options.

"...and how to do it? :confused:", you may ask...


If you have a Nvidia graphics-card, you'll probably need one of these driver tweakers:

NOTE: someone says the latest Nvidia drivers already include this option, with the name "Maximum pre-rendered frames", check if you have that in your drivers already if you do not wish to download one of the "tweaker programs" above.


This is to unlock various extra options in the driver options (in the Nvidia control panel/driver in case of NVtweak).
For the other ones (RivaTuner, nTune and Nhancer), those will have their own separate, extra driver controls.

If you have already installed one of these programs, you just have to change the value of the PreRender (in Direct3D options).
The default value is "3" (three), if you reduce that value to "0" (zero), or "1" (one) you'll have better response from your wheel-controller in game, so the steering response delay will be much improved, if not totally fixed.

Here's an image showing how to change this, in this case with RIVA TUNER (image shows v2.09, an older version):

(click image to enlarge it)
Posted Image




If you have an ATI graphics-card, you'll probably need one of these driver tweakers:

  • Ati-Tray-Tools
    (NOTE: latest version of ATT is now compatible with 4XXX, 5XXX and 6XXX series of ATI/AMD HD graphics cards)

  • RadeonPro

This is to unlock various extra driver controls found in these tools.

If you have already installed one of these programs, you just have to change the value of the Flip Queue Size (in Direct3D options), which is the ATI equivalent for Nvidia's PreRender.
Likewise, the default value is "3" (three), if you reduce that value to "0" (zero), or "1" (one) you'll have better response from your wheel-controller in game, so the steering response delay will be much improved, if not totally fixed.

Here's an image showing how to change this, in this case with Ati-Tray-Tools:

(click image to enlarge it)
Posted Image

...

Some say that using "0" (zero) prerendered frames may cause CTD with some games (I never had any problems?), so use "1" (one) if you ever experience such a problem.

Also note that, with these driver tools you may also create specific game profiles with these values changed/customized.

Have a nice sim-driving! :thumbup:

Edited by DucFreak, Jun 22 2011 - 09:16 AM.


#2 alexbap

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Posted Jun 20 2011 - 07:56 PM

Hi Lucio!
This trick is just for displaing wheel or also for ingame controller imput?
Thx

#3 aSa

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    Denny Hulme

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Posted Jun 21 2011 - 12:42 AM

alexbap:

I have not tried this trick (I don't have that need for now), but as it just adjust Directx pre-rendering options, I would say it is just a visual trick.


cheers..

#4 DucFreak

DucFreak

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Posted Jun 22 2011 - 08:34 AM

View Postalexbap, on Jun 20 2011 - 07:56 PM, said:

Hi Lucio!
This trick is just for displaing wheel or also for ingame controller imput?
Thx

In practice what you feel is that it works for both.

What this means is that the latency (or lag, or response time, whatever you want to call it) is pretty much null after this trick.
The displaying wheel (in-game) visually responding imediately to your inputs (through the real one, in your hands) is a reflection of that, and you'll feel definitely feel it while driving in-game. :)


EDIT: updated first post with procedure for ATI to have this "trick" in use.

Edited by DucFreak, Jun 22 2011 - 09:18 AM.





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