Will273

X Plane View Panning

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Anyone know what might be causing the stutters when I'm panning my views inside the cockpit? I'm getting good frame rates but whenever I look around the cockpit the view will stutter. It mostly happens if I'm flying in a big city or cloudy weather. The forward view seems fine but it's just when I change the view and look out the left or right side of the cockpit...that's when it stutters but the frames rates are still good at the same time. I did change the rendering settings which were on the high side and changed them to one of the lower presets which helped...still get the stutters but not as bad and the flight model seems to have improved along with better frame rates. Are stutters unusual when panning views from inside the cockpit?

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What are your system specs for CPU, RAM, and graphics card, and what monitor resolution are you using?  That's usually a good starting point for debugging this kind of thing. Also, are you flying one of the default XP11 aircraft or payware aircraft? Some of the payware models can use a lot of GPU vram with high res textures.

FWIW, I never see stuttering when rotating the cockpit view with either the joystick hat or TrackIR, with the system specs listed below.

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Sorry...should have included that. Graphics card is an NVidia GTX 1080...the FPS box says...f-act 35 -40 fps...frame 0.023...CPU 0.023...GPU 0.023. I'm using Carenado's Saratoga TC but when I used a default aircraft like the Cessna 172 or King Air C90...it's not quite as bad. Performance is better with default aircraft but the add-ons look better. I don't remember the resolution but somewhere around 1080 or above but not 4K.

 

UPDATE: Been making some rendering adjustments and that seems to be where the problem is. I had everything set to high...looked beautiful but caused the judders when I panned the view. I lowered the settings to one of the presets...low or med low and it runs better with no judder when panning. The flight model does seemed to have improved too. From here on in I'll have to do my tweaking toward the lower graphics end instead of trying to get away with higher settings which are more than my system can really handle. The improved flight model makes it worth while I think and is an even trade off. I think I can find a sweet spot.

Edited by Will273

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Texture resolution, reflection detail and anti-aliasing are the biggest performance killers.

I also have stutters when panning the view while running XP11 on my laptop and blame it on the slow RAM (DDR3 2133 MHz), the GTX960M's slow and small VRAM (2 GB plus 2 GB from main RAM if necessary) and slow hard drive on which the page file resides.

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It doesn't have much to do with that, trust me, I've had the same issue with various settings on my high-end system.  Use your mouse instead of the pan and it will be much smoother.  Hold down the right button and move the mouse- same as pan but takes a little getting used to.  You can also adjust the pan rate and that may help, but I can only move fast pan left or right, up or down, not at other angles so I just use the mouse instead.

Edited by dal330200

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The answer was given at the Flight Sim Expo in Orlando. The answer is simply that the OpenGL driverputs the not neede4d datat in the system RAM ahnd the used textures in the VRAM. But if you pan the driver suddenly needs these textures so it moves the data from VRAM to the RAM to find space for some textures in the RAM in your VRAM.

They will fix this by putting smaller versions of the textures in the VRAM. So when you are panning it can use these textures till you stop your movement than it can load the needed textures one single time.

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