If you can handle the smaller shapes but are having difficulty keep them aligned together, causing some of them to feel slightly floating or disconnected, try thinking about the overall shape that they form.

• For example, it's easy to ignore the larger, underlying shapes of the buildings when they're covered in other smaller box shapes but*, the building is also a box*.
• Think about how these shapes fit within the larger shapes. It will serve as landmark as well for how proportion each of the internal shapes as being section (i.e. this shape is 1/2 the size of another shape or 1/3, 1/4, etc)

By Khashif Moore

The teal lines indicate the building underneath, which, arguably, hard to see, but we only need one angle of the front most corner, and the angle of the roof on the right side to extrapolate the angle of the plane of the overall building. All shapes should seem like they sit atop the same plane.

by Christian

Here the outside building is aligned to the side vanishing points, but the vanishing point , but the shapes inside should also generally align to a similar vanishing point since they're very close to the building.

Here is a drawover of the reference image to show you what the lines should be.

But where do I start if I'm can't sketch these lines in? We're drawing in ink!

https://www.handprint.com/HP/WCL/perspect4.html

Even if you don't sketch these lines in, you should kind of visualize pieces of it on the page as soon as you draw your first 3D object/boxy shape OR even the first plane you draw.

Some people who draw like to call this an anchor point, and I refer to it as a "landmark".

Use this landmark to find the lines that go towards the vanishing points, and make sure everything else in your image is aligning to them!