The earth globe appears weird when adding a SkyNode

[virtuozo007]

I encountered a strange problem when adding a SkyNode onto the globe, which has bothered me for several days. The problem is that if I don't add the sky node, everything works fine, but after I add the sky node, the problem in the picture below appears. There are something like longitude and latitude lines on the earth, still with some red/green/yellow triangle faces. (I removed the earth file to better visualize the problem.)

The osgearth_viewer.exe application has the same problem too, as belows:

The codes i used to initial the earth viewer were very simple:

osgEarth::Util::SkyNode* m_pSkyNode = osgEarth::Util::SkyNode::create(skyOptions);
m_pSkyNode->setName("SkyNode");
m_pSkyNode->setEphemeris(ephemeris);
m_pSkyNode->setDateTime(dateTime);
pViewer->setLightingMode(osg::View::SKY_LIGHT);
m_pSkyNode->attach(pViewer, 0);
m_pSkyNode->setLighting(true);
m_pSkyNode->setAtmosphereVisible(false);
m_pSkyNode->addChild(mapNode);
root->addChild(m_pSkyNode);

There is another interesting thing, If I comment out the codes bellow which i added in the main.cpp before the QApplication's Constructor:

       QSurfaceFormat format = QSurfaceFormat::defaultFormat();
   #ifdef OSG_GL3_AVAILABLE
       format.setVersion(3, 2);
       format.setProfile(QSurfaceFormat::CoreProfile);
       format.setRenderableType(QSurfaceFormat::OpenGL);
       format.setOption(QSurfaceFormat::DebugContext);
       qDebug() << QObject::tr("OPENGL3");
   #else
       format.setVersion(2, 0);
       format.setProfile(QSurfaceFormat::CompatibilityProfile);
       format.setRenderableType(QSurfaceFormat::OpenGL);
       format.setOption(QSurfaceFormat::DebugContext);
       qDebug() << QObject::tr("OPENGL2");
   #endif
       format.setDepthBufferSize(24);
       //format.setAlphaBufferSize(8);
       format.setSamples(8);
       format.setStencilBufferSize(8);
       format.setSwapBehavior(QSurfaceFormat::DoubleBuffer);
       QSurfaceFormat::setDefaultFormat(format);

The longitude and latitude lines thing disappear, but the red/green/yellow triangle faces still remains :

So, maybe it's a bug about OpenGL , I guess?

My compiling environments: Windows 11 , VS 2019, vcpkg

Here is the osgearth version information: [osgearth info] [Capabilities] osgEarth Version: 3.5.0 build 149 [osgearth info] [Capabilities] GDAL Version: 3.8.2 [osgearth info] [Capabilities] OSG Version: 3.6.5 [osgearth info] [Capabilities] OSG GL3 Features: yes [osgearth info] [Capabilities] OSG FFP Available: no [osgearth info] [Capabilities] CPU Cores: 12 [osgearth info] [Capabilities] GL_VENDOR: NVIDIA Corporation [osgearth info] [Capabilities] GL_RENDERER: NVIDIA GeForce GTX 1080 Ti/PCIe/SSE2 [osgearth info] [Capabilities] GL_VERSION: 3.3.0 NVIDIA 546.33 [osgearth info] [Capabilities] GL CORE Profile: yes

I am really confused on this. Has anyone encountered the same problem? Please help me, many thanks!

[virtuozo007]

If i comment out the QSurfaceFormat codes, the stars in the sky disappear too, but the sun remains.