[ros-users] rviz pointcloud display

I've noticed that the rviz pointcloud display only handles certain types
of channels: intensity, rgb, curvature. However, there may be other
channels, like confidence that the user might like to visualize. Is
there anything I can do to visualize such channels other than: 1)
overloading an unsued channel (e.g., curvature) or 2) forking my own
version of rviz?

Thanks,
Patrick Beeson