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First understand the simple special nouns:

 

1.HL (Horizon Line, HL / Eye Level), horizon line ) refers to an imaginary line at the same level as the observer's line of sight, usually representing the horizontal position corresponding to the observer's eyes.

2.MP (Measuring Point) is an auxiliary point, usually used to ensure the size and proportion of an object is correctly reduced in perspective. Its main function is to measure distance and depth in perspective drawings, especially to ensure consistent spacing between objects in situations of foreshortening.

3. VP (Vanishing Point) (also known as "vanishing point"), (but I am used to marking it directly as V)

The vanishing point is the point where all parallel lines converge in perspective. As the object moves away from the viewer, these lines converge toward a vanishing point, eventually appearing to be infinitely far away.

4. Understanding of one-point perspective, two-point perspective, and three-point perspective

The number of vanishing points determines the perspective type:

 

One-Point Perspective → There is only one vanishing point (usually at eye level). Suitable for facing scenes such as tunnels, corridors, etc.

 

Two-Point Perspective → 2 vanishing points, suitable for objects at 45 degree angles (such as building corners).

 

Three-Point Perspective → 3 vanishing points, usually used for extreme overlooking or looking up (such as looking down from a tall building).

 

Some complex perspectives include "10-point perspective and above", but beginners only need to understand the above first, and then learn more related knowledge by themselves. There are also some technical terms that I have not mentioned above, such as horizon line, sky point, location, etc.

 

*Note/In this article, the HL line and the horizontal line are considered to be on the same line for the sake of easy understanding. In fact, sometimes the HL and the horizontal line overlap on the same line, but sometimes the HL and the horizontal line are separated.

Although perspective is difficult, CSP has a convenient tool available.

When we want to draw a grid structure with the correct perspective depth and ensure that the proportions of each grid look natural, we need to use measurement points (MP) to assist in measuring and determine the effect of isometric reduction through auxiliary lines.

It is also possible to use measurement points (MP) to ensure that the reduction in height in perspective is consistent. As shown above, the height of the red vertical line, the other red vertical lines in perspective still maintain the same proportion.

For example, in 2-point perspective, you want to draw a square in perspective, but it is difficult to draw. In this case, you can do this

Things to note

*The location of the measurement point (MP) changes depending on the perspective.

In two-point perspective, it is usually at eye level, close to the vanishing point (VP).

But in three-point perspective, because there is a third vanishing point (VP3), MP may not be at eye level. (I won’t demonstrate MP in 3-point perspective)

*Note that the HL line and the horizontal line here coincide with each other. HL and the horizontal line are different things, so don't confuse them.

The bisectors of the measuring points can be placed in different positions. It will not affect the accuracy of the measurement results, but it will affect the strength of the perspective deformation in the picture.

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This is a floor plan. Since I am not a real designer, I will just give it a rough understanding. The grid in the upper picture can roughly grasp the position of the items in the perspective view, and the height of the items in the lower picture (but I did not list them all. I am really casual)ಥ_ಥ.

The three-dimensional house I drew this time uses a three-point perspective.

Thanks to the help of CSP, I adjusted the canvas to the appropriate position, so I could draw the correct vanishing point (VP) without any brain hacking. The lines drawn by using the vanishing point (VP) + measurement point (MP) are neater.

The red line in the picture is the proportional height, and the approximate height is measured along the vanishing point.

Compare with the floor plan and draw the positions of objects similar to those on the floor plan from the square grid.

As for the height of each object, cut it into smaller and equal parts according to the height of the drawn wall and draw it along the vanishing point. In perspective, you will get lines with roughly the same height in front and behind. By analogy, you can roughly grasp the height of the object itself.

After drawing, adjust the draft to opacity (so that you can understand it yourself) and draw the line drawing.

For example, GIF (light) uses red lines to indicate a light spot (V) above and a light spot (V) in the horizontal line vertically below. On one of the vertical lines facing the object, the light spot (V) above uses a black line to draw a line along the vertex of a vertical line on the visible object, and then the light spot (V) below uses a red line to draw a line along the bottom point of the same vertical line of the visible object. The extension lines of the upper and lower parts are drawn until they can intersect and a new (point) appears. (This is done for each set of vertical lines of the object) The position of the shadow can be roughly grasped.

When I think about (O_O;) how much trouble it takes to make light, and how I have to aim at the vanishing points one by one, I almost feel dizzy, right?

Just a general understanding is fine, don't be too particular (after all, I'm not a designer, so I don't need to be very precise). Here is just a brief introduction.

The background color is good.

Approximate position of the light.

Add a layer of shadow and light + light from the window into the house.

Add material texture + external clouds.

Adding the effect of falling snow, the floor seems too flat, so I added the thickness of the floor along the original vanishing point, and it was done.

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Some of my statements may be wrong, and some may be right. I am sorry if any mistakes cause trouble to you (｡•́︿•̀｡)

 

Hope it helps you.