How to attach a point cloud file as an external reference.
Attach a Point Cloud to a Drawing
- Click Insert tab
Point Cloud panel Attach. 
At the Command prompt, enter POINTCLOUDATTACH. - In the Select Point Cloud File dialog box, find and select a ISD, PCG, RCS, or RCP file to attach to the drawing. Click Open.
- In the Attach Point Cloud dialog box, specify your preferences for insertion point, scale, and rotation.
- (Optional) To prevent the attached point cloud from being moved or rotated, select Lock Point Cloud.
- (Optional) To display information such as point cloud size, intensity, and colors, click Show Details.
Control the Individual Scan File Settings in Attached RCP File
Turn on this setting if you do not want your drawing to be affected by changes to the on/off status of individual scan files that are referenced in the reality capture project (RCP) file.
- At the Command prompt, enter POINTCLOUDVISRETAIN.
- Enter one of the following values:
- 0. The drawing inherits the most recent on or off status of individual scan files referenced by the attached RCP file.
- 1. The drawing retains the on or off status of individual scan files at the time the RCP file was attached.