Quick3D CustomMaterial with Item as Texture

Hello,

I face an issue rendering a mesh with a CustomMaterial with an Item as texture.

As you can see in the project I attached,

• when there is only the Image visible in the Item, and this Image has been animated, then the texture (in CustomMaterial) is rendered
• once the Image is not anymore the only one displayed in the Item, the texture is replaced by a random label (visible in the screenshot attached)

Moreover, I cannot understand why the texture, when it is displayed, is just displayed even if I did comment the binding of my CustomMaterial's itemSource property
(line 52 in main.qml, tagged "[ — HERE — ]")

Can you help me to understand if there is an issue in QtQuick3D or not.
I did try a lot of things to try to fix my issue
(- changing the Texture properties,

• using a ShaderEffectSource and a ShaderEffect as Texture.sourceItem,
• changing ShaderInfo.version (seems ignored by the way)
• trying some ShaderInfo.shaderKey
• using texture2D() instead of texture() in .frag
• and lots of other things)

I really need to display an Item in my real project, I have a lot of different items, images and texts inside

Best regards,

Erwan DUCHAMPS
Stellantis