# How do I find the inclination of my Horizon line with respect to the paper/board while sketching a 2-point perspective?

Premise: In a 2-point perspective, the two vanishing points dictate the angle of the lines parallel to the respective axes they represent, say X and Y, while the third axis, say Z, is perpendicular/orthogonal to the horizon line, i.e., the line connecting the two vanishing points.

Problem: When I am drawing a two point perspective and the vanishing points are well within the bounds of the paper, I am able to figure out the horizon line by connecting the vanishing points, and hence I know how much inclined/vertical the lines parallel to Z axis would be.

But when the vanishing points extend beyond the paper, I have no means to connect them as I don't effectively know where exactly they exist, and hence can't establish the horizon line or the angle it makes with the paper's edges.

In such a scenario, how am I supposed to draw the lines pertaining to the Z axis?

• err.. draw to fit the paper. Perhaps you need larger paper. Nov 13, 2014 at 19:14