Qt Quick 3D - Custom Shaders Example

 // Copyright (C) 2019 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

 #include <QGuiApplication>
 #include <QQmlApplicationEngine>
 #include <QtQuick3D/qquick3d.h>

 int main(int argc, char *argv[])
 {
     QGuiApplication app(argc, argv);

     QSurfaceFormat::setDefaultFormat(QQuick3D::idealSurfaceFormat(4));
     qputenv("QT_QUICK_CONTROLS_STYLE", "Basic");

     QQmlApplicationEngine engine;
     engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
     if (engine.rootObjects().isEmpty())
         return -1;

     return app.exec();
 }