I am trying to apply a texture from a jpg file to a mesh (.obj file).
Both files originate from a 3D scanner and can be open in 3D tools, showing correctly.

How can I get a Qt3D mesh object to properly show in a viewer with a texture which originates from a file?

I create a mesh and load the data from the .obj file.
I create a texture object and load the data from the .jpg file.
I then create a material object and associate the texture to it.
The object then shows as plain gray in the visualizer.
Here is the code snippet. I also set a QPointLight (code not shown).

# Root entity.
self.rootEntity = QEntity()

# obj
filepath1 = "some_3D_file.obj"
texture_filepath1 = "some_image_file.jpg"

mesh_entity = QEntity(self.rootEntity)
mesh_object = Qt3DRender.QMesh()
mesh_object.setSource(QtCore.QUrl.fromLocalFile(filepath1))
mesh_entity.addComponent(mesh_object)

# Create texture
mesh_texture_image = Qt3DRender.QTextureImage(self.rootEntity)
mesh_texture_image.setSource(QtCore.QUrl.fromLocalFile(texture_filepath1))
mesh_texture_2D = Qt3DRender.QTexture2D(self.rootEntity)
mesh_texture_2D.addTextureImage(mesh_texture_image)

# Create material
mesh_material = QDiffuseSpecularMaterial(self.rootEntity)
mesh_material.setNormal(mesh_texture_2D)
mesh_material.setDiffuse(QColor(255, 255, 255, 0))
mesh_material.setSpecular(QColor(55, 55, 55, 0))

mesh_entity.addComponent(mesh_material)

I tried various combinations of setting normal, diffuse, and specular, with either the loaded texture and/or plain QColor values with no luck of showing the texture image.
It seems setNormal does not do much whatever I do with it. Attributing a Qcolor to setDiffuse results in the object showing the corresponding color in the viewer (as expected).

As a side question, why is there so few results when I search for Qt3D information/issues/code exmaples? I would have expected a large community using the module. Is everyone using some other 3D renderer/visualizer module that I am not aware of?

Thanks for your help.