As a reference, I used this video uploaded many years ago:
My visualization looks bad in comparison and I have the following questions, which I hope will help me to improve visual quality:
1. How can I remove the flickering of those points, that are almost on the surface of the earth? Occurs on camera movement.
2. Why does points are shaking up&down while camera is moving?
3. Why do I observe rows of points with large gaps between those rows? Is my initial data not dense enough or I should do something with Z coordinate?
4. It seems to me correct to make the point size increase as the camera approaches. Is this the correct approach? If so, how to achieve this?
That video you referenced is from our commercial point cloud toolkit Juniper that works with osg and osgEarth. If you're interested in checking out Juniper for use on your project let us know and maybe we can setup a phone call.