I want to create a scene like in 3D builder

[timob256]

I want as in the picture

I get it like this

here is the code :

import QtQuick 2.1 as QQ2
import Qt3D.Core 2.0
import Qt3D.Render 2.0
import Qt3D.Input 2.0
import Qt3D.Extras 2.0

Entity {
    id: sceneRoot

    Camera {
        id: camera
        projectionType: CameraLens.PerspectiveProjection
        fieldOfView: 45
        aspectRatio: _window.width / _window.height
        nearPlane: 0.1
        farPlane: 1000.0
        position: Qt.vector3d(0.0, 10.0, 20.0)
        viewCenter: Qt.vector3d(0.0, 0.0, 0.0)
        upVector: Qt.vector3d(0.0, 1.0, 0.0)
    }

    FirstPersonCameraController { camera: camera }

    ShadowMapLight {
        id: light
    }

    components: [
        ShadowMapFrameGraph {
            id: framegraph
            viewCamera: camera
            lightCamera: light.lightCamera
        },
        // Event Source will be set by the Qt3DQuickWindow
        InputSettings { }
    ]

    AdsEffect {
        id: shadowMapEffect

        shadowTexture: framegraph.shadowTexture
        light: light
    }
 
    // Plane entity
    GroundPlane {
        material: AdsMaterial {
            effect: shadowMapEffect
            diffuseColor: Qt.rgba(0.5, 0.5, 0.5, 1.0)
//            specularColor: Qt.rgba(0, 0.5, 0, 1.0)

        }
    }
}

GroundPlane.qml

import Qt3D.Core 2.0
import Qt3D.Render 2.0
import Qt3D.Extras 2.0

Entity {
    id: root
    property Material material

    PlaneMesh {
        id: groundMesh
        width: 50
        height: width
        meshResolution: Qt.size(2, 2)
    }

    Transform {
        id: groundTransform
        translation: Qt.vector3d(0, -5, 0)
    }

    components: [
        groundMesh,
        groundTransform,
        material
    ]
}

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