How to overlay scanned 3D image as reference for making model

Getting started with sketchup and trying to figure out how to use a 3D scan as a 3 dimensional overlay to make an accurately sized house model.

I am looking for something like what is shown in this youtube video. https://www.youtube.com/watch?v=sOFYFhlntX8
Looks like it is undet extension. Does anyone have any experience with this extension? what are file size limits? or other options? thanks

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