1. A concise explanation of the problem you’re experiencing.
I set color user geometryAttribute, the color is with alpha(rgba), but in fact, the geometry is pure, I watch the document, it says "The color attribute.
8-bit unsigned integer. 4 components per attribute." is alpha also an integer
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.