This is a common question asked 2 / 3 times a year (it seems.)
Here is a recent similar thread:
… in which I responded:
You can export to a LightUp (.luca
) file (using the LightUp SketchUp extension.) *
Then the person doing the walkthrough will need the free LightUp Player applet, or a free LightUp Player browser plugin.
* The main LightUp SketchUp extension is not free, but there is a 30 day trial.
I suggest to reask your interactivity questions at the LightUp forum:
https://www.light-up.co.uk/forum/
ping @AdamB