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Point clouds disappear from memory issues, what to check?

  • 1.  Point clouds disappear from memory issues, what to check?

    Posted 05-25-2022 11:43
    I am using TBC 5.6.
    I have modern cad machine with 16 GB ram, and 3 monitors (2 at 1920 x 1200, and 1 larger).
    Decent Nvidea graphics card.
    When I am in a 3d view, with point cloud of say 40 million pts, the point cloud will disappear.
    I can click to 2d view and it shows. Then I get a crash soon after, with message saying out of memory issues.

    I changed memory cache to 8 gb in options, no change.
    What did help is moving the TBC session to one of the 1920x1200 monitors.
    So, this seems to be related to how hard I am making the graphics card work.
    Anyone else run into this and found some compromise they ended up using?

    We only have 3 TBC users but I bet someone out there manages many people so has lots more experience with it.
    thx

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    James Maeding
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  • 2.  RE: Point clouds disappear from memory issues, what to check?

    Posted 05-26-2022 11:09
    Edited by Sonia Kelly 05-27-2022 12:02
    Hi Jeff,

    This does sound like a graphics card issue, you are on the right track. From our Construction Support team try these following steps and let us know if that improves the performance while working on the point clouds.

    First try switching from Directx11 to OpenGL in Support>options>advanced. This has improved performance dramatically depending on the graphics card you have in your PC.

    If this doesn't help then update the graphics driver by going directly to the card manufacturers website.

    Next - and most importantly - disabling a laptops integrated graphics card and forcing TBC to use the discreet graphics card is crucial when utilizing Photogrammetry workflows.

    Here's how to do this:

    a. Open your Windows Control Panel, select BitLocker Drive Encryption, and select to suspend protection - if it is turned on. This is required to make the BIOS change required to disable the integrated graphics card.

    b. Restart your laptop computer and select to enter the BIOS setup utility as soon as the first image displays (prior to Windows launching) by pressing the appropriate shortcut key (for example, F1, F2, F10, ESC, or DEL). The BIOS shortcut is typically displayed briefly on the screen during startup.

    c. Once in the BIOS setup utility, navigate to the location of the graphics card control and use the appropriate method to disable the integrated graphics card. The method for doing this will vary depending on the BIOS setup utility. You can search the Internet for specific instructions. For example, for a Dell® laptop implementing NVidia Optimus™ technology, you would select Settings > Video > Switchable Graphics in the BIOS setup utility, and then uncheck the Enable Switchable Graphics check box.

    d. Save changes and exit the BIOS setup utility to continue computer startup.

    e. If BitLocker Drive Encryption was suspended, turn it back on.


    Chad
    Western DCP

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    Chad Haschen
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    Original Message


  • 3.  RE: Point clouds disappear from memory issues, what to check?

    Posted 05-26-2022 11:16
    Ok, thanks for the replies. I wonder how that bios switch will affect other things, great instructions though.

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    James Maeding
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    Original Message