βοΈ Draw along: a complete room in five steps #
1.
Draw a light horizontal eye-level line. Mark one vanishing point near its centre.
2.
Draw a back-wall rectangle around the point, with two corners above eye level and two below.
3.
Lay a ruler through the point and each corner; extend the line outward to form the room edges.
4.
Add a side-wall window. Its uprights stay vertical; its top and bottom follow lines toward the same point.
5.
Keep the room and window edges; erase construction lines inside the back wall. Add one light and one dark wall tone.
Follow the five construction steps above. In this fixed, straight-ahead view, front-facing horizontal edges stay horizontal, vertical edges stay vertical, and edges receding into the room head toward one vanishing point.
Raise the vanishing point while keeping the back-wall rectangle fixed. In this construction, the floor spreads more into view and the visible ceiling narrows. Redraw the corner rays rather than merely moving the label.