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Step 8Demystifying the horizon
Draw a 6th rectangle that contains the vanishing point within it (see below).
From the image below we can now assert a couple of things.
1) All boxes at least have one visible face. This is the closest rectangular face to you, the viewer, and it is parallel to to the horizon line.
2) Any box sitting on the horizon line and is located to the left or right of the vanishing point will have 1 additional visible face that fades into the distance. This additional face is a side-ace. (visible faces in total: 2 - a front face and a side face)
3) Any box sitting above the horizon line and is located to the left or right of the vanishing point will have 2 additional visible faces that fade into the distance. These additional faces are a side-face and a bottom-face. (visible faces in total: 3 - a front face, a side face and a bottom face)
4) Any box sitting below the horizon line and is located to the left or right of the vanishing point will have 2 additional visible faces that fade into the distance. These additional faces are a side-face and a top-face. (visible faces in total: 3 - a front face, a side face and a top face)
5) Any box sitting in front of the vanishing point will only have one visible face. You will be unable to see the top, bottom, left or right-faces since all vanishing lines are hidden from view. (visible faces in total: 1 - a front face)
6) Any box sitting directly above the vanishing point (and horizon) will have 1 additional visible faces that fade into the distance. This additional face is a bottom-face. (visible faces in total: 2 - a front face and a bottom face)
7) Any box sitting directly below the vanishing point (and horizon) will have 1 additional visible faces that fade into the distance. This additional face is a top-face. (visible faces in total: 2 - a front face and a top face)
In strict one-point perspective, no solid object can be drawn and/or viewed outside the parameters just listed.
Using these guidelines, you can accurately (re)present any forward facing three-dimensional object that you may find in life.
From the image below we can now assert a couple of things.
1) All boxes at least have one visible face. This is the closest rectangular face to you, the viewer, and it is parallel to to the horizon line.
2) Any box sitting on the horizon line and is located to the left or right of the vanishing point will have 1 additional visible face that fades into the distance. This additional face is a side-ace. (visible faces in total: 2 - a front face and a side face)
3) Any box sitting above the horizon line and is located to the left or right of the vanishing point will have 2 additional visible faces that fade into the distance. These additional faces are a side-face and a bottom-face. (visible faces in total: 3 - a front face, a side face and a bottom face)
4) Any box sitting below the horizon line and is located to the left or right of the vanishing point will have 2 additional visible faces that fade into the distance. These additional faces are a side-face and a top-face. (visible faces in total: 3 - a front face, a side face and a top face)
5) Any box sitting in front of the vanishing point will only have one visible face. You will be unable to see the top, bottom, left or right-faces since all vanishing lines are hidden from view. (visible faces in total: 1 - a front face)
6) Any box sitting directly above the vanishing point (and horizon) will have 1 additional visible faces that fade into the distance. This additional face is a bottom-face. (visible faces in total: 2 - a front face and a bottom face)
7) Any box sitting directly below the vanishing point (and horizon) will have 1 additional visible faces that fade into the distance. This additional face is a top-face. (visible faces in total: 2 - a front face and a top face)
In strict one-point perspective, no solid object can be drawn and/or viewed outside the parameters just listed.
Using these guidelines, you can accurately (re)present any forward facing three-dimensional object that you may find in life.
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