Nearest-neighbors textures filtration in QtQuick3D

[HoShiMin]

Hi all!
Just look at this sample:

View3D {
    // It doesn't works!
    renderMode: View3D.Offscreen
    smooth: false

    PerspectiveCamera {
        position: Qt.vector3d(0, 0, -600)
    }

    DirectionalLight {
        ambientColor: "#ffffff"
        brightness: 0.0
    }

    Model {
        source: "#Rectangle"
        materials: [
            DefaultMaterial {
               diffuseMap: Texture { source: "qrc:/images/img.png" }
            }
        ]
    }
}

My texture is still blurry if it is a low-res image (so, 'smooth' field doesn't work at all).
So, how can I use a nearest-neighbors filtration?