A necessary condition to visualize the Point Cloud in the rayCloud view is that the graphic card (GPU) is compatible with OpenGL 3.2.
To verify that the drivers of the graphics card support OpenGL 3.2:
1. Download and install GLview (free of charge): http://www.realtech-vr.com.
2. Open OpenGL Extensions Viewer.
3. Under the OpenGL section, click See details...
4. Check that 3.2 is included in the list of Core features.