view-points has gained a new option --pass-through (or --pass for short) that allows it to become part of a processing pipeline.
The basic usage is:
When multiple data sources are viewed only one can be given the pass option. pass will also disable --output-camera-config and the ability to output the point under mouse with double-right click.
For a more complete example try:
using the attached cube.bin input file.
You should see three concurrent windows like this:
showing three stages of the processing pipeline.