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Motion blur auto photography for ac

Discussion in 'Screens & Videos' started by eSEA One, Jan 8, 2015.

  1. eSEA One

    eSEA One Hardcore Simmer

    The one thing that I notice here with a lot of images (not all) that the cars look static, no motion blurred wheels and backgrounds! (I am not going to point these images out , don't want to offend anyone) the cars look like they are parked when they are really going at speed. This really bugs me. Some folks get the wheel spin in the image but lack the motion blurred background, this I see a lot and kind of has a bit of a disconnect . Dont get me wrong there are some who do have both and these definitely have the realism look.
    IRL Cars go fast, cameras can shoot really fast but a good a photographer will not use fast shutter speeds, they will shoot at relatively slow speeds, with panning the camera to capture the speed thus the background and wheels are in motion blur. (like these below, not saying that I am a good photographer but this effect is what I am trying to achieve)
    DSC_0191.jpg DSC_0175.jpg DSC_0187.jpg DSC_0089.jpg

    It is all too easy to use a fast shutter speed to get the shot but the result is a static looking image. Like this
    DSC_0003.jpg and this DSC_0052.jpg a slight bit of wheel motion here DSC_0117.jpg but still looking a bit static.
    Now I have not really got into exploring AC photomode much yet but from what I gather it would seem to me that this motion blur is not so easy to achieve. I will look into this and explore the possibilities;
    Anyone in the knowhow feel free to give the AC photographers your advice.
    _______________________________________________________________________
    Here are some of the great tips from posters in the thread
    --------------------------------------------------------------------
    From @vfdesignz It's possible, sort of. You have to active the free cam in AC.
    --------------------------------------------------------------------


    Go in Steam\SteamApps\common\assettocorsa\system\cfg and open the assetto_corsa.ini

    Set ALLOW_FREE_CAMERA to 1.

    Now open the camera_onboard_free.ini

    Replace the code with that one:
    [CAMERA_SETTINGS]
    ROTATION_SPEED=0.1
    ESC_DOF_FACTOR=1
    MOUSE_LOOK_SPEED=.02
    MOVE_SPEED=1
    MIN_MULT=0.1
    MAX_MULT=3
    FOV=35
    EXPOSURE=35
    MOVEMENT_DELAY=0.2
    SPHERICAL_COORDS=0

    Go in AC, turn on Motion blur, drive the car around, go to the replay and now press F5. Now you can position the camera with W, A, S and D as you want to and the background should be blurred.
    _______________________________________________________________________________
     
    Last edited: Jan 8, 2015
  2. WardogZ

    WardogZ Racer

    I expect it's due to the fact that motion blur causes quite a substantial frame drop when used, and some of us ( well I do) forget to put it 'on' during replays for screenshots, i'm only guessing here, i'll try a few meself with motion blur on. ;)
     
    D.Jankovic likes this.
  3. demonized

    demonized Simracer

    Like this?

    244210_screenshots_2014-10-25_00003.jpg
     
    WardogZ and eSEA One like this.
  4. eSEA One

    eSEA One Hardcore Simmer

  5. eSEA One

    eSEA One Hardcore Simmer

    Yeah! that could be an issue if just doing a screen capture when you do not have motion blur on! but not if you are doing a replay surely that is not a problem . If there was a shutter speed for camera options that could be pre set for in game screen capture motion blur would not needed t unless the ingame camera doesn't work that way.
    Hate to bring it up here but Forza 4 has a great camera function that did wonders to the imagery that hid the last generation game realism! Some of my Forza 4 camera work:
    FM4_TCS1 R4 R2 06.jpg CRA SAR28.jpg CRA SAR36.jpg CA SAR7.jpg
     
    John Lennonjohto likes this.
  6. Iain L

    Iain L Rookie

    Forza 4's camera mode is excellent in general, and has much to teach Kunos I suspect in terms of both ease of use and additional controls we don't have here.

    But yes, for the example at hand, it has full control over how much motion blur you want in a shot; so far I've not even figured out how to turn AC's blur on in photo mode at all (I leave it off during racing for both performance and I think it looks better off). But then, part of the complexity with implementing motion blur for photo mode is what object you want the camera tracking - either one of the cars in frame, the track or some compromise between them.
     
    John Lennonjohto likes this.
  7. eSEA One

    eSEA One Hardcore Simmer

    In Photography motion blur is achieved through:
    • Slow shutter speed (longer exposure but this can lead to overexposure in bright environments)
    • Aperture - High f/stop numbers, large number = small aperture = less light, this compensates the overexposure. However this can make a big depth of field- more in focus, so the far background can be in sharp focus and this might not be what you want lower f/stop's create a shallow depth of field (DOF) but let in more light
    • Low ISO (sensitivity) numbers (this is another option that counters the overexposure that you might need if using a shallow DOF)
    • Panning - moving the camera with the car (subject) this keeps the car in focus
    @AC Support Can we apply these principles to the AC camera with what you have coded?
     
    Iain L likes this.
  8. Iain L

    Iain L Rookie

    Oh, proper DSLR-style manual controls would be just perfect. I don't know what the graphics engine can offer there, of course.
     
  9. Vítor Sousa

    Vítor Sousa Hardcore Simmer

    Gran Turismo is great for photography. It would be cool for such features.

    Of course I understand such features aren't the top priority in AC though
     
  10. BATINA74

    BATINA74 Racer

    Motion blur set on 8
    I tried with panning style - moving the camera with the car (subject) this keeps the car in focus

    [​IMG]

    [​IMG]
    [​IMG]
     
    felipe vaiano, Akis Kev and eSEA One like this.
  11. Vítor Sousa

    Vítor Sousa Hardcore Simmer

    What you mean you tried with panning style?? You mean positioning the camera from the side as it was a panning shot??
     
  12. vfdesignz

    vfdesignz Hardcore Simmer

    When the car drives around, you try to follow it with your cam / DSLR, with a slower shutter speed and / or higher Aperture. You have to follow the car near perfectly, that the car is right in focus, and sharp, but the background is "motion" blurred.

    That's called panning.
     
    eSEA One likes this.
  13. Iain L

    Iain L Rookie

    That's great - I've just been trying to work around the problem with shallow focus:
    [​IMG]
     
  14. eSEA One

    eSEA One Hardcore Simmer

    Looking good here but for some reason the rim of the wheel is not spinning but the tyres are, could be the sin you are using is missing the rim blur
     
  15. Vítor Sousa

    Vítor Sousa Hardcore Simmer

    I know what panning is :p
    I've done a few shots using that technic. I was interested in it's use of such technic in AC
     
  16. vfdesignz

    vfdesignz Hardcore Simmer

    It's possible, sort of. You have to active the free cam in AC.

    Go in Steam\SteamApps\common\assettocorsa\system\cfg and open the assetto_corsa.ini

    Set ALLOW_FREE_CAMERA to 1.

    Now open the camera_onboard_free.ini

    Replace the code with that one:
    [CAMERA_SETTINGS]
    ROTATION_SPEED=0.1
    ESC_DOF_FACTOR=1
    MOUSE_LOOK_SPEED=.02
    MOVE_SPEED=1
    MIN_MULT=0.1
    MAX_MULT=3
    FOV=35
    EXPOSURE=35
    MOVEMENT_DELAY=0.2
    SPHERICAL_COORDS=0

    Go in AC, turn on Motion blur, drive the car around, go to the replay and now press F5. Now you can position the camera with W, A, S and D as you want to and the background should be blurred.
     
    eSEA One, Iain L and Vítor Sousa like this.
  17. Vítor Sousa

    Vítor Sousa Hardcore Simmer

    Thanks. Will give that a try :)
     
  18. Iain L

    Iain L Rookie

    Thanks for the ALLOW_FREE_CAMERA tip. Re: rims and wheels spinning independently, it seems that's one of Photo Mode's many bugs - it's pretty random as to whether or not I get stationary rims; as you can see in that shot above of mine it worked that time.
     
  19. Akis Kev

    Akis Kev Alien

    Dajonaga, eSEA One and BATINA74 like this.
  20. BATINA74

    BATINA74 Racer

    photo mode shot and catch with mouse:D
    [​IMG]

    ingame ac camera
    [​IMG]
     
    Dajonaga, Akis Kev and eSEA One like this.

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