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How to setup 21:9 display (and 32:9)

Discussion in 'ACC Hardware Discussions' started by Nahkamarakatti, Feb 16, 2020.

  1. brandaopj

    brandaopj Rookie

    one more time thanks for your help
    Tim Larsen likes this.
  2. maxcoslo

    maxcoslo Gamer

    In my opinion the ACC FOV is horizontal.
    I looked at the link for the calculation and it gives me, for my 34 "monitor and a distance of 70cm, 59 for hFOV and 27 for vFOV.
    With FOV at 27 in the long straight of Paul Ricard it seems to go on foot and instead you are at 270 km / h and the curves much but much more closed compared to what they can be looking at the plan of the track (I can't make a comparison with the reality because I've never been there).
    With Fov at 59 everything seems more real ... the sense of speed and the degree of the curves.
  3. brandaopj

    brandaopj Rookie

    i am using the correct 27 fov with 34 monitor and it seem real for me.
  4. ohjeah

    ohjeah Simracer

    It's not an opinion thing, acc uses vertical fov and that's it. If you put the calculated horizontal value to acc menu it means you're running much higher fov than you should. Getting used to the correct fov might take some time if you've always been running much wider, that's why it might seem slow on the straights etc in the beginning.
    Last edited: May 22, 2020
    Nahkamarakatti likes this.
  5. maxcoslo

    maxcoslo Gamer

    I did the Paul Ricard test just to see the difference. With FOV at 27 I refer to the sense of speed that can be had in comparison to reality and also the feeling of distance (100 meters in the game seem to be about 50 of reality). The depth is crushed while with the FOV at 59 everything seems more real ... speed and depth. Do this test too and you will see the difference but compare with the sensations that you can have in reality ... go on the long straight and see how the road runs on your sides and then look at the signs of the distance before the curves if in your opinion they give you the real feeling of the distance between the 100 and 50 meter signs.
  6. Most games (not only racing) and action cameras have very incorrect fov - wider than reality. This gives better sense of speed, but it is incorrect. For example running in first person shooter (take doom or whatever else) looks like driving with 100kph compared to ACC.
    I think that is why most people perceives ACC kind of slow when they put the correct fov.
    David Bertholom and Tim Larsen like this.
  7. maxcoslo

    maxcoslo Gamer

    I made the comparison between ACC and my feelings in reality (speed and distance).
    I want to remember that a football field is about 100 meters long so try to see your feeling of distance (depth) when you see the distance signs before the curves by changing the FOV.
    Adjusting the FOV in ACC also changes the sense of depth, a bit like zooming in the photograph, and instead it shouldn't do it since the monitor we have in front of our eyes is as if we had a window.
    If I have a 1 meter wide window I see a tot of landscape but if I have a 2 meter wide window I will see more landscape but the depth will remain the same and I will not see more or less crushed
  8. ohjeah

    ohjeah Simracer

    Not sure if i understand correctly what you're saying but think you're just misunderstanding something.. In your last example if you have a meter wide monitor (=window) and a two meter wide monitor the depth of the lanscape and everything else too will be exactly the same if the fov is set up correctly for both. Assuming the distance to the monitor stays the same you just see much more with the wider one. There is no zooming or crushing.
  9. maxcoslo

    maxcoslo Gamer

    Indeed! But if I go to the link of a few messages ago with my 34" monitor I have the vFOv at 27 and the hFOV at 59 but with FOV 27 I see everything smashed (the signs 100 and 50 seems 10 meters instead of 50) and the speed on the straight of Paul Ricard seems to go to 50 km / h instead of 200.
    With 59 it seems all more realistic (the 50 meters seem 50 meters and at 200 km / h it seems to go at 200 km / h).
    I think when you have the double adjustment (FOV and seat position) it doesn't work very well.
    If I'm not mistaken with the triple screen you can't change the FOV which remains at 54 ... right?
    If you knew how to attach photos and videos and thus make it better understand what I mean maybe it would be easier ... but just try it to see.
    I'm not so sure that ACC has vFOV for these very reasons.
  10. ohjeah

    ohjeah Simracer

    Ok, this example might be a bit extreme but should do the trick. 49" 32:9 monitor with viewing distance of 50 cm. Calculated vfov is about 37 degrees. Hfov a bit over 100.

    First picture is with the vfov value, the second with hfov. Should be quite clear which is the one that acc uses.

    With triple screens you don't adjust the fov directly but put the measurement of your monitor sizes, angles etc and the game does the rest based on those.
  11. maxcoslo

    maxcoslo Gamer

    in which of the two is the distance from the curve more similar to reality? Keep in mind that 100 meters are like a football field
  12. ohjeah

    ohjeah Simracer

    Obviously the first one is the one where everything seems correct. Judging distances just by looking at a 2d screen is of course always going to be difficult but with the right fov everything is sized and placed correctly and look natural.
    Gupise likes this.
  13. maxcoslo

    maxcoslo Gamer


    Fov 29


    Fov 63


    Fov 63 but seat position like at Fov 29....the distances of the signs seem more real with the fov at 63 instead of 29 (I always remember that 100 meters are a football field to be able to make a comparison of the perspective of 100 meters ... practically in door-to-door football)
  14. Tim Larsen

    Tim Larsen Racer

    Seem is the operative word here.
    ohjeah likes this.
  15. Slowbloke

    Slowbloke Simracer

    63 is waaaay off reality... sense of speed is what u see to your side not in front. U really need triples for that sensation.

    If you are happier at 63 go for it..... but it is not accurate.
    ohjeah likes this.
  16. brandaopj

    brandaopj Rookie

    just looking for the 200 marker in can see that in the correct fov it is just in front of you, and with your preferred fov it´s much distant. This makes that you´re breaking points way off real ones.
  17. maxcoslo

    maxcoslo Gamer

    https://andyf.me/fovcalc.html my monitor is 34" aspect ratio 21:9 and distance 65cm.
    I also wanted to insert the comparison videos but they weigh too much and the site does not allow me to upload
  18. Slowbloke

    Slowbloke Simracer

    No worries.

    Im also on a 34 inch monitor but about 75cm.. I should be 25.3 but Im working my way to it - Ive settled on 29 for now after having it at 35 for a while.... Im guessing the calculator says about 23 for you ? Seems quite the tight view doing it 100% correct.
  19. maxcoslo

    maxcoslo Gamer


    This is to default with FOV 54


    FOV 29 but without adjusted seat position


    Fov 29 but with adjusted seat position


    FOV 63 with adjusted seat position

    As you can see if you start with the default position and set only the FOV with 29 you don't see the dashboard.
    In ACC the FOV is like the zoom in the photograph ... the more the focal length of the zoom is increased (in ACC the FOV is decreased) and the less depth of field is had and the photos become flatter decreasing the distances between two subjects at different distances while decreasing the zoom focal (in ACC increases the FOV) the photos start to have more depth and you can perceive the different distances of the two subjects.

    Attached Files:

    Last edited: May 24, 2020
  20. maxcoslo

    maxcoslo Gamer

    My opinion is that the acc fov is horizontal and not vertical. In addition to the sensations of speed and depth, try to take a track map or go to Google map and look at the track from above and then do the same track to see if the curves have the same angles. Doing tests I believe that with fov at 60 it is the most correct value.
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