We're loving Noesis GUI. It's quite easy to use and very powerful. But we're not really artists. Before we would use probably purchased from the asset store for a full theme styled in our game. Is there anything equivalent for noesis? If there's not full themed is there a good source of stock assets for game ui? There seem to be a lot for web, but we're looking more for something with dark fantasy like diablo 4.

Thanks for your help!

We're not aware of any theme assets available in the Unity Asset Store.

Although you have access to our Noesis Theme, and you can use it as reference to create your own control styles. Basically each control style provides a Template that is the representation of the control, and it can contain any visual element (like borders, shapes, images...) or even other controls.