Qt Quick 3D - Custom Instanced Rendering

// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
VARYING vec4 vCustomData;
VARYING vec3 vGlobalPosition;
void MAIN()
{
    vCustomData = INSTANCE_DATA;
    // MODEL_MATRIX does not exist when instancing
    vec4 pos = INSTANCE_MODEL_MATRIX * vec4(VERTEX, 1.0);
    vGlobalPosition = pos.xyz;
}