For the hallway picture, each blue line corresponds with what should be a parallel line, along edges of square tiles or the corner of the floor and the two walls.
For the dinosaur doll, each white dot connects a feature on the dinosaur to that feature’s reflection.
For the shadows, each white dot connects a corner of the object to the corner of the shadow.
I think each of these lines is meticulously chosen.
Not all but a lot of those blue lines seem to be quite randomly drawn.
For the hallway picture, each blue line corresponds with what should be a parallel line, along edges of square tiles or the corner of the floor and the two walls.
For the dinosaur doll, each white dot connects a feature on the dinosaur to that feature’s reflection.
For the shadows, each white dot connects a corner of the object to the corner of the shadow.
I think each of these lines is meticulously chosen.