Points Dim when Moving

I'm displaying a point cloud of > 1000 points. Everything is OK, except when navigating: on some machines, the points noticeably dim while the user is moving. When stopped, the points return to normal.

When displaying the same data on the same machine using Eyeglass, for example, there is no dimming.

Is there anything we can do to prevent the dimming of points on all machines?

Thanks