Optimizing QY CAD display performance
Displaying 3D data is one of the most intensive operations your computer performs. With QY CAD you can find the optimum balance among the factors that influence display speed and display quality, based on your computer's capabilities.
QY CAD is designed to use OpenGL(r) for displaying 3D data. Most graphics cards are designed to accelerate OpenGL(r) based applications with little or no intervention from the application or user. You should use as much graphics card functionality and acceleration as possible to optimize both display speed and display quality. As display technologies and rendering techniques advance, most graphics card vendors take advantage of them. However it is not always possible for older graphics cards to support new functionality efficiently.
To accommodate legacy configurations, QY CAD provides several options to control the application display methods for 3D data. To modify the method QY CAD uses to display graphics, choose Application menu 
→Settings→Options→View tab:
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Graphics Card Driven (Advanced)
This option provides full acceleration for all 3D displays and should provide the smoothest display possible for manipulating graphical objects or editing profiles and sketches. To achieve this higher quality display, QY CAD requires a higher level of graphics card support. Such support may not exist for older graphics cards. This option is designed specifically for use with the latest mid-range and high-end graphics cards. This is the only option that supports the HQ setting.
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Graphics Card Driven
This option provides full acceleration for all 3D displays and should provide a stable display across a wide variety of midrange to high-end graphics cards. While all displays are hardware accelerated, this option avoids accessing graphics requests that may not be widely supported. Choose this option if QY CAD is unable to generate consistent displays when using the Graphics Card Driven (Advanced) option.
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Software Driven (Advanced)
This option provides support for all general purpose 3D displays and should provide a stable display for situations where graphics acceleration is unavailable or all other options produce unacceptable graphic anomalies. This option does not support shaded highlight or high quality rendering. Choose this option if QY CAD is unable to generate consistent displays when using the any other option.
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Software Driven
This option is provided for diagnostic purposes and should not be used for normal displays. The primary reason for this option is to isolate the source of any graphic anomaly that might occur. In most cases, the graphics driver contains a flaw or is out-of-date. This option should only be selected if directed by support to verify such a condition.
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Use Display Buffers
A display buffer is an OpenGL(r) capability that allows the CAD application to load geometry and images to the graphics card memory to improve performance and reduce latency during dynamic view manipulations. Using the dedicated resources of the graphics card is much faster than using process memory. This option is set by default for graphics card driven options and is not available for software driven options.
If available, the Graphics Card (Advanced) option provides the best quality display.
Automatically Selecting Graphics Cards
You can improve system display by allowing QY CAD to automatically select the appropriate graphics card setting during startup.
QY CAD delivers the AutoConfigure.txt file to the QY CAD Program folder. This file contains information about widely used graphics cards such as the vendor, card name, driver version, default application display, and maximum application display. When the Automatic Selection option on the View tab is set, QY CAD uses the information in the AutoConfigure.txt file to build the list of display options. For example, if the default setting in the AutoConfigure.txt file for your installed graphics card is Graphics Card (Advanced), then the Graphics Card Driven (Advanced) is automatically set.
If your graphics card is not in the list in the AutoConfigure.txt file and the Automatic Selection option is set, the graphics card setting defaults to Software Driven (Advanced). If your graphics card is not in the list in the AutoConfigure.txt file and the Automatic Selection option is cleared, the graphics card setting list on the View tab contains all available settings.
If your graphics card is in the list in the AutoConfigure.txt file and the Automatic Selection option is cleared, the graphics card setting list on the View tab contains all settings up to the maximum value for your card. For example, suppose the maximum value for you graphics card is Software Driven (Advanced), the list on the View tab contains Software Driven and Software Driven (Advanced).
For more information on the contents of the AutoConfigure.txt file, you can use a text editor to open the AutoConfigure.txt file. However, the settings in this file are very sensitive and you should not edit them. You should report any graphics card related problems to QY CAD Support.
Troubleshooting
If you are dissatisfied with QY CAD graphics display, do the following:
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Insure that you have the most recent graphics card driver from the manufacturer.
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If display is still not optimal, choose a lower Application Display option from the list above.
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