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Not that I am aware of...

The 3DFin plugin is accessible via the 'Python plugin', so you have to go to 'Plugin > Python plugin > Plugins > 3D Forest Inventory'

Can you simply hide the cloud? (or did I misunderstand your question?).

Also, you might be interested in using the 'Point list picking' tool if you want to select multiple points on a particular entity.

Do you mean that you want to register different scans with a small overlap? If yes, then you should look at the ICP tool (https://www.cloudcompare.org/doc/wiki/index.php/ICP). Pay attention to the 'overlap' parameter.

Else, you'll have to share some pictures to help us understand.

Wow... no it's not possible. And even by tweaking the code it wouldn't be that simple...

Ah probably not... you would have to look at the code.

Which version are you using? In older versions, the 'sensor' part of the PCD file was ignored (i.e., when the entity was transformed, the sensor was not updated). Now in the latest 2.13.x versions, it is correctly updated. So either you need to upgrade CloudCompare, or if it's the latest version, th...

That's weird... Have you tried a clean uninstall/reinstall process?

Not sure to understand, as this tool is meant to compute the volume between 2 different 'states' of the stockpile. If your 4 scans are representing the same epoch, then you can simply merge them (Edit > Merge) and then use a constant altitude in the 2.5D calculation tool. Else, I'm not sure to under...

Would you be able to share the files with me? (admin@cloudcompare.org)