Blur Busters Forums

You get less ghosting during larger vertical totals.
The double-image ghosting shows up during fast horizontal motion at 120fps@120Hz. In certain situations, it looks almost as if you're running at half-framerate (60fps@120Hz) like the 60fps UFO at www.testufo.com viewed during 120Hz strobed.

If you want to see this effect during Counterstrike, do some high speed horizontal strafing or turning in front of high-contrast stuff, while tracking eyes on background objects. It is much easier to see if you tweak things so you have no microstutters (e.g. good mouse, or using keyboard strafing to test motion), test framerate matching refresh rate. The double-image effects will often show up during fast horizontal motion. Some people are not sensitive to this, while others see it instantly (and are bothered by it)

Larger vertical totals reduce the strobe crosstalk (ghosting).
The ghosting effect shows up in a horizontal band across the screen, and adjusting Crosstalk will raise/lower the horizontal band of ghosting. Using a larger vertical total makes it easier to hide this ghosting between refreshes by adjusting the ghosting to be offscreen (larger vertical totals reduce ghosting, by creating more time for LCD GtG transitions to finish between refresh cycles, before being made visible via strobe backlight once per refresh).

kokett wrote:I tried some stuff, this time im using:
Blur Reduction on
120 Hz
Brightness 100
Contrast 50
Low Blue Light --greyed out
Black eQualizer --greyed out
Colors 95 92 100
Ama High
Instant On
Sharpness 5
Gamma 5
Picture Mode Standard
XL2420Z 120Hz ICC Profile

is this VT1502 trick working now? I didnt get a Black Screen this time and this is my Setup in Custom Resolution Utility. No idea how to check if its working..


are those Settings alright for playing Counterstrike? Still looking for any kind of improvement! Resolution 1440x1080 so its 1:1 and 4:3
My Monitor OSD Information tells me current Resolution@60Hz, but it's set to 120Hz in Windows and ingame OSD Information is also @60Hz but if I turn VSync on I got 120FPS. ?? I think this is since I changed VT1502

Yes, it's working. When you use nonstandard timings, the monitor uses the 60 hz backlight voltages instead of 120hz, that's why it reports 60 hz. This can potentially shorten the lifespan of the backlight, although this isn't proven, since those voltages are designed for 60hz operation. Strobemaster's article explained it more.

thanks for the replies. So im still playing at 120Hz right? Good, is there anything else I can improve? Found out some BenQ Blur Reduction Settings that work for me, did the VT1502 trick but im still curious what settings you guys would suggest for playing counterstrike, like your settings in strobe utility and brightness/contrast/color temperature etc.

The only things anyone else can suggest are your own eyes. Everyone's preferences are different.
Just set stuff and test.
That's the fun of having computer hardware.
Eyes are like music (ears)--it's all subjective.

Sorry for digging up this thread, but I have some questions. Let's say I want to use 1024x768 for some odd reason and I want to apply the VT trick. When I do this I get out of range warnings. When I set the VT for 1280x720 and 1280x960 to 1502 it worked like a charm, but for lower resolutions like 1024x768 and 800x600 I get loads of errors from my monitor when I start for example counterstrike.

So my question is, how do apply a higher VT so that my screen gets brighter with motion blur reduction enabled?

M0rb1d_ wrote: When I do this I get out of range warnings.

That's weird. I've just created two custom resolutions (1024x768 and 800x600) at 125Hz with 1500VT and it worked fine. I don't know if this may affect it, but GPU scaling is enabled in my case.

M0rb1d_ wrote:So my question is, how do apply a higher VT so that my screen gets brighter with motion blur reduction enabled?

Well, you know how to do it, but it's strange that it didn't work for you. Check the GPU scaling setting and see if it solves it.
And the higher VT doesn't exactly make the screen brighter. It just solves crosstalk and makes the strobe length steps higher, so you now reach the same levels of brightness (and persistence) earlier.

Higher VT allows a longer strobe without increasing top/bottom LCD artifacts, so in a way it makes things brighter. It doesn't of course mitigate the inherent tradeoff between strobe length and eye-tracking-induced motion blur (only higher LED backlight current can escape this tradeoff).

Well that's not the 'full' reason why it's brighter, although that might also affect the brightness to a degree (might be the reason the 60hz pulse widths get used in the first place?)

Technically, the reason it's brighter because the monitor switches to 60 hz pulse widths instead of using the pulse widths usually used for that refresh rate, so the persistence is -higher- at the same strobe duty.
60hz has a range of 0.167ms at 001 strobe duty to 5ms at 030 strobe duty.

You can test this easily and quickly (especially using the driver restarter).
Make a 120hz VT 1500 resolution.
Remove the 100hz VT, save and restart.

What you'll now see is 120hz with strobe duty 006 will have the same brightness as 100hz with strobe duty 010.
010 is 1.0ms persistence at 100hz pulse widths (100hz= 0.1ms to 3ms, over 30 steps).
since 60hz is 0.167ms to 5ms in 30 steps, 006 is 1ms, thus, the same brightness.

masterotaku wrote:

M0rb1d_ wrote: When I do this I get out of range warnings.

That's weird. I've just created two custom resolutions (1024x768 and 800x600) at 125Hz with 1500VT and it worked fine. I don't know if this may affect it, but GPU scaling is enabled in my case.

M0rb1d_ wrote:So my question is, how do apply a higher VT so that my screen gets brighter with motion blur reduction enabled?

Well, you know how to do it, but it's strange that it didn't work for you. Check the GPU scaling setting and see if it solves it.
And the higher VT doesn't exactly make the screen brighter. It just solves crosstalk and makes the strobe length steps higher, so you now reach the same levels of brightness (and persistence) earlier.

If you're trying to make a lower resolution detailed resolution with a VT tweak, know that this is sort of useless if you are NOT using native resolution, because at non native lower resolutions, you usually want access to the Display Mode scaling settings so you can get an scaled image that looks nice. Using VT tweaks prevents you from using the monitor OSD scaling size options correctly!

Are you trying to get the "black bars" to the left/right of the image while keeping the screen full size vertically (e.g. aspect ratio?) or keep the panel 1:1 (black bars around all edges?)

TBH, if you're getting errors trying to use VT tweaks at low custom resolutions, the absolute easiest thing to do is to remove the VT tweak if you're going to play CS (try 120hz without a VT tweak), then do the following:
1) set video card control panel to "Scale image to full panel size"
2) go into game, set 1024x768, image will be full screen stretched to edges. Then go into the OSD, go to display mode and select 19" 4:3 (1024x768 is a 4:3 aspect ratio).
You should now have a perfect 4:3 centered image scaled to a 19" size. The crosstalk at the bottom and top should be off the screen, if you raise the strobe phase to 012. This image will be interpolated, as a 1:1 1024x768 on a 24" screen would be MUCH smaller (you can see the 1:1 option in the OSD for yourself), but a 19" 4:3 will at least make the game play at a manageable size!

Set strobe duty 012 for 1ms persistence (strobe pulse persistence range for 120hz is 0.8ms (001 strobe duty) to 2.5ms (030 strobe duty).

---------------

The OTHER thing you can do is to REMOVE all of the standard and established resolutions in CRU, create a LCD reduced 144hz detailed resolution if 144hz suddenly disappears after you do this, and add the 100 and 120hz VT tweak resolutions. Then run counterstrike at 1024x768 this way, and set the Nvidia/AMD control panel to "preserve aspect ratio" (Otherwise you'll have a tiny 1024x768 image in the middle of the screen centered if its 1:1, or a stretched ugly fullscreen at wrong aspect (16:10) if its full size).

The drawback to doing THIS is you LOSE the ability to use the monitor scaling functions as they get bugged with VT tweaks, so you're limited purely to the video card.

Will these VT mods work at lower resolutions like 720p and 900p? If so, do you use the same VT from the OP? And this is only beneficial if you're using blur reduction, correct?