Augmented reality workflow

I was asked to do something like this: https://www.youtube.com/watch?v=Me9qIISQBUw
anyone can point me out the workflow?
thanks

Um workflow? What ever you need to do to get the building under 2m polys.
Assign standard materials, carefully name them.
Put everything into unity (tell unity to import the materials the “legacy” way), get vuforia, follow their basic tutorials.
That’s it, if you want to use marker based tracking on ios or android or markerless tracking on android.
If you want to use markerless tracking on ios, there is an arkit plugin for unity. For anything apple related you’ll need a mac book or imac.

thanks! what if I target a more realistic look than the example I put before? what would be the process?

Learn how unity handles lightbaking:

UV everything and bake AO maps for small details.
And last but not least, make some good PBR shaders;)
That should get you a much better result.
You might then even need to get down to 1m polys in order to have enough budget for the shaders and lighting.
Depends on your target device.

thank you lhno!

…or try Zapper from Zapworks.