A quick Grocery Store and Rando-Building using fSpy (Patreon)
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I guess the title shouldn't necessarily be "using fSpy", since the fSpy part is only like 4% of the total process, and the rest is in Blender, but it's a great way to get the camera aligned to a photo, and makes the rest of the process way easier, since once you have it lined up, you can just extrude faces out along the various axis!
If you have an image of a building (or an interior), and aren't sure how to start modeling it, fSpy is just a really great way to get started.
You can download the application here, and there's a link to the blender addon on the same page :D
Here's the grocery store picture of my local Albertsons if you want to give it a shot.