If it's digital, shrink the whole thing down so the vanishing points are on the canvas. Rough it in enough that you have a good idea where all the furniture etc is, then make it larger, hiding the vanishing points.
If its traditional, I use green painters tape to extend the horizon line outward on the table, so I can place the vanishing points.
Ace-Preformance in the post "Perspective"
2022-01-23 17:45
If it's digital, shrink the whole thing down so the vanishing points are on the canvas. Rough it in enough that you have a good idea where all the furniture etc is, then make it larger, hiding the vanishing points.
If its traditional, I use green painters tape to extend the horizon line outward on the table, so I can place the vanishing points.
Hope this helps!