1. A concise explanation of the problem you're experiencing.
Can anyone help me to find visible points in the camera frustum and creating frustum with and coloring the visible points with one color and other points with another color.
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.
We’re working on some of that functionality right now in the pick-ray branch, which should allow you to use the depth buffer and pick anything in the scene. It should be available by the September 1st release.
Any updates on this?
That feature didn’t end up making the September release. But we’re still working on it! There’s a pull request open which you can take a look at (or even clone the GitHub repo if you want to play around with the feature yourself). I don’t see anything blocking this from making the next release right now.