hand drawing's technique of expression

Hand-drawing is an important required course for students who are engaged in architecture, clothing display design, window design, home soft decoration design, space floral design, fine arts, garden, environmental art, photography, industrial design, visual communication and other majors. So what is hand drawing's expression? The following is for reference only!

hand drawing-expression technique

pencil drawing technique

(1) Pencil is the most commonly used and universal tool in painting. In indoor drawing, we should learn to organize and arrange lines regularly according to the characteristics of the object's shape, texture, etc.

and learn to draw ideal effects with other auxiliary tools.

(2) Don't make too many repeated changes in the drawing, you must have a well-thought-out plan, and have a basic plan in advance for the direction and shade of each object. In the process of drawing, the contrast between light and shade is gradually deepened from shallow to deep, but the steps should not be too many, just two or three times, and some places can be in place at one time. Pencil, generally choose a pencil of about 4B for drawing, and use an eraser as little as possible.

(3) pencil lines are divided into freehand lines and tool lines. Freehand lines are vivid and subtle, and can represent complex and soft objects. Tool lines are regular and simple, and are suitable for representing large surfaces and flat and smooth objects. In order to keep the strength and lightness of the pen without destroying the outline of the figure, you can use a ruler, a curve ruler and a thumb to block it, and if necessary, you can carve a pattern to block it.

(4) The lead powder of the soft pencil that has been drawn on the drawing is easy to be rubbed, so it must be protected. You must learn to use your little finger to support the picture to draw lines, or use paper to cover the picture that has been drawn.

(5) Water-soluble colored pencils can give full play to the characteristics of water solubility. They can be painted with water to get a sense of infiltration, or they can be wiped with fingers or paper to give a soft effect.

Marker techniques

Markers are widely loved by designers because of their rich colors, simple coloring, bold style and rapid drawing.

(1) There are two kinds of marker pens: flat head and round head. The front and side of the flat head are different in color width, so it can play its shape characteristics and form its own unique style when carrying pens.

(2) Markers are not easy to modify after coloring, and generally should be light first and then dark. When coloring, it is not necessary to spread the color all over the picture, and the picture will be more lively and vivid if the focus is on local characterization. The superposition of the same color of markers will appear deeper, but repeated superposition will have no obvious effect, and it is easy to stain the color.

(3) As with pencil drawing, the pen-carrying cable of marker is divided into two categories: freehand and tool, which should be selected according to different scenes and object shapes, textures and performance styles.

(4) Water-based marker can be dipped in water when it is modified (it is difficult to wash it thoroughly), while oily marker can be washed away or washed away with pen or cotton ball dipped in toluene.

(5) The brushwork and interest of marker pen are pleasing, but it is expensive. You can use oil painting pen and chalk dipped in watercolor paint, and use the ruler to transport the pen, and you can also get some interests of marker pen.

pen and needle pen are ideal tools for drawing lines. They give full play to the characteristics of various shapes of pen tips, use the arrangement and organization of lines to shape the light and shade of the body, and pursue the spatial effect of virtual and real changes.

Corresponding linear organization can also be adopted for different textures to distinguish rigidity, softness, coarseness and thinness. You can also organize the changes of density and density in all directions according to the relationship between spatial interface transition and image structure, so as to achieve the sense of hierarchy, space, texture and quantity in the picture performance, as well as the sense of rhythm and rhythm in the form.

Watercolor rendering technique

(1) Watercolor rendering is a common technique in architectural painting, and watercolor performance requires accurate and clear manuscript graphics, so as not to scratch the paper (it is best to use another paper.

(2) The coloring procedure is generally from shallow to deep, from far to near, and the bright parts and highlights should be reserved in advance. When painting a large area, the pigment should be mixed more than less, and the general trend of hue should be basically accurate. The color with excessive contrast is easy to get dirty after repeated.

(3) Three techniques are commonly used in watercolor rendering: vignetting, superimposition and flat painting.

vignetting method: tilt the drawing board, and after the first flat coating, use water or add color under it while wet to make it gradually fade (light or dark), so as to form a gradual weakening and strengthening effect. In the process of fainting, the pen is transported in a ring shape. When encountering water and color accumulation, the pen must be squeezed dry and then gradually sucked.

superposition method: the drawing board is placed horizontally, and the light and shadow interfaces are well divided. The same color is painted flat, the light is left and the dark is painted, and the painting is done after drying, and the effect of changing the same color at different levels can be achieved by overlapping layer by layer.

flat painting method: the drawing board is slightly inclined, with horizontal strokes in a large area and vertical strokes in a small area, which can achieve a uniform and neat effect.

(4) At present, the pastel drawings of pens are more common in indoor performance drawings, which combine watercolor techniques with pen techniques to give full play to their respective advantages and have a simple, lively and vivid artistic effect.

The expression techniques can be roughly divided into dry and wet (or thick and thin) painting methods, or the combination of dry and wet painting methods < P >.

Features:

(1) Wet painting method: Wet painting refers to painting the drawings with clear water before coloring, or it refers to using more water when mixing pigments, which is suitable for showing large-area background color (such as walls or floors) and showing the connection and infiltration between colors.

When painting wet, you should pay attention to the defects that the background color is easy to appear, and it is easy to produce pink, dirty and gray effects. If this happens, it is best to dip the dissatisfied color in water with a pen and repaint it after drying. The repainted color should be slightly thicker and have certain coverage.

(2) dry painting: it is not without water, but with less water and thicker color. Its characteristics are: clear and definite brush strokes, saturated and bright color, and detailed and in-depth image description. However, if it is not handled properly and the brush strokes are too messy, it will also destroy the space and overall sense of the picture.

gouache color has good covering power and is easy to modify, but it is not easy to cover the part with rose or violet as the background color, so it is better to clean it and re-color it, otherwise the red and purple background color will always come up.

The color of gouache varies greatly from dry to wet. Under normal circumstances, dark and fresh colors will feel lighter and grayer after drying. When making local modification and picture adjustment, wet the local surroundings with clear water, and then make comparative adjustment.

in the practice of indoor performance drawing, it is often a combination of wet, dry and thick. Judging from the drawing program that is conducive to modification and adjustment and in-depth performance, it is desirable to be thin rather than thick. Specifically: large areas should be thin and local areas can be thick; The prospect should be thin and the prospect can be thick; The place where the duckbill pen is to be used for pressing lines should be thin, and the place with high local brightness and brilliance can be thick. From the order of coloring, it is advisable to draw thin before thickening.

pastel painting techniques

chalk painting is easy to use, with elegant colors, soft contrast and warm mood. It can give full play to its advantages in the performance of bedrooms, living rooms and study rooms, as well as the shading of indoor walls and the treatment of local lights.

colored chalk is fine in powder and rich in color, but it lacks dark color, so it can be painted with charcoal pencil or marker, especially with dark gray colored paper as the keynote, which can show the charm of pastel.

Toner stroke drawing program:

A. First, use charcoal pencil or marker to draw the sketch effect of interior design on colored paper, with sufficient light and shade and volume, and the dark part must be painted enough, so it's better to pass than to pass.

B, after the sketch relationship is completed, paint the light-receiving surface first, which is similar to a colored pencil, and can be used as a local shade. The toner should not be too thick at one time. For large-area changes, it can be wiped evenly with fingers or cloth heads, and it is best to use a pointed paper eraser to wipe the fine parts, which can not only deal with the fading changes of color, but also enhance the adhesion of toner on the paper.

C, after the big effect of the picture comes out, just mention a little reflection in the dark.

Don't put too much pink on the picture, but make good use of the background color of colored paper. Therefore, according to the design content and atmosphere, the color paper with appropriate tone should be selected in advance.

After painting is finished, it is best to spray the screen with a stationary liquid (setting agent) to facilitate the preservation.

Pen-spraying technique

Pen-spraying technique is to spray the colors in the pen onto the screen through the pressure of an air pump, and its modeling mainly depends on the remaining shape after covering. The process of inkjet printing

is the combination of inkjet printing, and the details of some objects and the performance of flowers and figures are described by other brushes. The picture effect is exquisite, the light and dark transition is soft, and the color changes are subtle and lifelike, as shown in Figure 6-26~ Figure 6-28 (color picture before the text).

the operation of inkjet is nothing more than "practice makes perfect". To complete a high-quality inkjet work, it is not only the mastery of inkjet tools, but also the skills of inkjet.

The common features of ink painting techniques are:

(1) the uniform change of color in a large area;

(2) Representing the natural transition between light and shade of surfaces and spheres;

(3) the smooth ground and its reflection;

(4) expressing the texture of glass, metal and leather;

(5) Perception of lights and light, etc.

Procedures and requirements for painting pictures:

(1) Shallow before deep, shallow before deep, broad before detailed;

(2) color processing should be simple, and seek change in unity, not unity in change;

(3) Pay more attention to the contrast and harmony of large color blocks in the picture, and pay less attention to the cold and warm changes of the monomer;

(4) emphasize the contrast between light and dark in the central subject, and weaken the contrast between black and white in the surrounding space interface and scenery.

(5) The highlight and lighting treatment at the turning point of the object should be carried out at the last stage. Highlights should not be white, but should be suitable for the inherent hue of the object, the distance in space and the distance from the light source.

(6) When spraying the light effect, don't just light it, just light a few key light sources, and it is better not to light it in the distance.

(7) The special pigment used for pen spraying must be mixed evenly to avoid blocking the pen, and the sprayed pigment is translucent on the paper.

(8) The pencil manuscript requires accurate and clear line outlines without waste lines.

(9) We must be cautious in the modification of brush strokes, and it is best to wash and re-spray large areas. (Generally speaking, the washed areas will also leave traces, so it is best to thicken the paint where it is re-sprayed, and then spray it twice after drying it once.) Or we can change the color directly on the prototype without washing, and then spray the adjacent colors with a pen.

8: Computer graphics tablet painting techniques

Computer graphics tablet.

Three principles should be followed in drawing hand drawing:

Authenticity

A, that is, the performance effect must conform to the objective reality of the design environment. Such as indoor space, furniture and so on, all require its authenticity. In addition, the three-dimensional modeling, material texture, lighting color, greening and character embellishment must conform to the effect and atmosphere designed by the designer.

B. Authenticity is the lifeline of the renderings.

a, you can't change the definition of space at will without departing from the actual size; (For example, the size of indoor space and furniture cannot be changed at will; To be true and practical);

b, you can't deviate from the objective design content and pursue a certain artistic interest and style of the picture subjectively and unilaterally; (Interior design renderings require authenticity and practicality; And painting can be arbitrary)

C. You can't understand the design intention wrongly, and the atmosphere effect is far from the original design. (to meet the requirements of the owner)

To sum up, we must ask our designers themselves or the designers entrusted by them to have a * * * understanding: authenticity always comes first.

scientificity

In order to ensure the authenticity of the renderings and avoid randomness or misinterpretation in the drawing process, we must treat every link on the screen in a scientific manner. Whether drafting, drawing or dealing with light, shadow and color, we must abide by the basic laws and requirements of perspective and color science, and take every design seriously with a rigorous and scientific attitude. Bitter before sweet; Haste makes waste.

artistry

renderings are not only a scientific engineering construction drawing, but also a painting with high artistic taste. Good renderings we regard it as an indoor decoration or even a permanent collection, which fully shows the artistic charm of a wonderful renderings. Therefore, a good design is also a good painting from another angle.

it is very important for us to correctly understand the interaction and relationship among them and give full play to their effectiveness in different situations. ;