Qt Quick 3D - Custom Materials Example

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 import QtQuick 2.15
 import QtQuick3D 1.15
 import QtQuick3D.Materials 1.15

 Node {
     id: weirdShape

     property CustomMaterial customMaterial

     property real xRotation: Math.random() * (360 - (-360)) + -360
     property real yRotation: Math.random() * (360 - (-360)) + -360
     property real zRotation: Math.random() * (360 - (-360)) + -360

     Model {
         source: "weirdShape.mesh"
         scale: Qt.vector3d(150, 150, 150)
         rotation: Quaternion.fromEulerAngles(-90, 0, 0)

         SequentialAnimation on eulerRotation {
             loops: Animation.Infinite
             PropertyAnimation {
                 duration: Math.random() * (10000 - 1) + 1
                 to: Qt.vector3d(xRotation -  360, yRotation - 360, zRotation - 360)
                 from: Qt.vector3d(xRotation, yRotation, zRotation)
             }
         }

         materials: [ customMaterial ]
     }
 }