My workflow is this:
- Create reconstruction, and texture or colorize the model.
- in 3D view, select Scene-Clipping Box-Create Clipping Box from ribbon.
- Create a clipping box surrounding the model you want to ‘crop’.
- select Reconstruction-Selection-Select All from ribbon.
- select Scene-Clipping Box-Clear Clipping Box from ribbon.
- select Reconstruction-Selection-Invert from ribbon.
- select Reconstruction-Tools-Filter Selection from ribbon.
- you now have created a new model containing only the contents of the clipping box from step 3.