1. A concise explanation of the problem you’re experiencing.
2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.
3. Context. Why do you need to do this? We might know a better way to accomplish your goal.
4. The Cesium version you’re using, your operating system and browser.
Can you explain a bit more what you’re trying to do? You should be able to create an entity with a billboard and an image if that’s what you mean. See this Sandcastle example: https://cesiumjs.org/Cesium/Apps/Sandcastle/index.html?src=Billboards.html
Perfect answer Omar, can I use as much unique images as I want or only one?
You can certainly use any arbitrary images, for example see the “Add multiple billboards” in the dropdown of that example on adding multiple different ones.