After a summer vacation, there were a lot of new people in the jar, and there were a lot of good mouse paints. However, after carefully observed, it is also worth thinking about it. Because of the picture, we always hope that the closer to the object. However, in the process of painting, there are many places in which there are vulnerabilities. Among them, the light and shadow are a big shortage, that is, the problem is that many friends who play pictures have not been professional art training, and the sketch foundation is not solid enough, so many problems have been produced when they paint. Now, let me start, everyone will study some sketch protecty in the PS rat paint.
Part.1 Sketch Theory
Sketch-Dessein, find information, art magazine written: Sketch is the basis of all paintings, which is a stage that must be passed in the process of research. (It seems that it is painted with PS, but also the foundation of sketch. After all, this is the foundation of all paintings.
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In the sketch, the first element is the line, sketch through the line to express the image and contour of the object, causing the concept of the viewer. Everyone knows that the two-wire side, three-line one. With the following animation, we can feel the charm of the line in the sense of space.
Fig.1
We can get a specific image from the line of lines. Therefore, through the means of the outline, the simple outlines can develop into exquisite works. Similarly, we are in a PS drawing, through similar means, we will continue to add new elements on a contour, making the works gradually full, and then constitute a delicate PS rat paint.
The three-dimensional characteristics of the object in sketch are achieved by controlling the gradual changes in the dark. The dark and dark have become another means of showing stereo. Due to the different properties of light reflections and refractions, and different properties exhibited in different media, a bright and dark is produced. The part of the light source is directly illuminated (can also be reflective), we call the bright part, the light source is not exposed (no light or light) we call the dark, of course, things are more than two extremes, the middle part of the middle part we call Mid adjust.
It is achieved by a curve tool (image >> Adjustment >> curve ORCTRL M) in the PS. Figure:
Fig.2
The two endpoints of the straight line in the curve panel represent the bright portion and the dark portion of the image, respectively, and the remainder of the straight line is collectively referred to as an intermediate adjustment.
Now let's compare the following effects by adjusting two endpoints in the curve tool.
Fig.3
Fig.3-1
Fig.4
Fig.4-1
Fig.5
Fig.5-1
Through these comparisons, I believe that all the three parts of the PS have adjusted the bright and dark have a preliminary understanding. Of course, the PS usually processes the RBG three-color pictures, and the adjustment is different in each channel. Teacher Zhao Peng's "Photoshop Curve Tools Simple Tutorial" believes that there will be more helpful for friends.
Now we have a summary of Part.1:
1, the real thing is to make out the outline and enrichment on the basis of the line;
Therefore, before we use the PS to make a good outline to make a good contour, it is very necessary. By outline the contour, determine the substantially proportion of objects, then add new elements on the basis, so that the picture is full.
2, the shade of the object;
Any physical object should be presented in the human eye, there is no extraordinary, dark and middle tune these three parts, in the figure, try to present the three-dimensional feeling of the work by adjusting the curve.
Part.2 perspective principle
First, let's take a few basic terms: (will be a bit formalization, but I still hope that you can read these, because I understand these points will help PS painting)
1, the horizon: is horizontal line with the painter's eyes; 2, heart: It is the point of the painter's eyes is on the horizon;
3, point of view: is the position of the painter's eyes;
4, the line of view: It is connected to the heart, and the line is connected to the line;
5, disappear: It is a corners that are not parallel to the picture, and the disappearance of the perspective of the perspective of the horizontal heart is destressed.
6, Note: It is a highly low tilting object (front of the house cover), disappearing at the point above the horizon;
7, location: It is close to a high-level sloping object (behind the house cover), disappearing the point below the horizon;
8, parallel perspective: There is a square or rectangular object in parallel with the picture. This perspective has neat, flat, stable, solemn feelings;
9, angular perspective: It is not to form a long square object perspective with parallel squares. This perspective can make the composition change;
Now, I will talk about the painting method of perspective.
The most basic form in sketch is a cube. Similarly, I also hope that you can cultivate yourself in PS paintings through painting cubes. In sketch, most of them determine the manifestation of the cube with the observation method of three faces. In addition, the angle caused by the boundary line of the surface and the surface can also imply the depth of the object, which involves the law of perspective. Similarly, in PS painting, usually the best practice method is multi-deposited, on which, gradually detachably, then turn to creation. Of course, this process is more boring, so I hope you have psychological preparation.
Perspective points a point in perspective (also known as parallel perspective), two perspective (also known as angular perspective) and three perspective.
1. Little perspective:
One point perspective is that the cube is placed on a horizontal surface, and the front side (front) four sides are parallel to the four sides of the drawing paper, and the upper parallel straight line is consistent with the height of the eye, and the front is a square.
Fig.6
2, two point perspective:
The two point perspective is to paint the cube to the screen, and the four planes of the cube are tilted into a certain angle with respect to the picture, and the depth of the departure is generated. In this case, the parallel line perpendicular to the upper and lower levels is also reduced, but there is no disappearance.
Fig.7
3, three points perspective:
Three-point perspective is that the cube relative to the picture, the surface and the ridge line are not parallel, the side of the face can extend to three disappearances, and the cubes will be formed to see a three-point perspective with a top or bottom.
Fig.8
Part.3 sketch composition
The composition is to consider and arrange for the screen content and form. How to pattern, directly affect the quality of the work, is like it in PS painting.
Now I talk about the principle of composition. Attack in a sentence: demand unity.
There are three points of composition:
1. The position of the picture topic graphics; 2, the position of the non-theme graphics and the relationship with the subject graph; 3, the position of the picture and the relationship with the graphic.
In three main points, the subject graphics of the screen are decisive, which determines the style of the picture in the position in the screen.
The pattern is divided into two categories: symmetric composition and equalization pattern.
Symmetric composition: The main form is placed in the center of the face, and the non-main form is placed on both sides of the main form, and the balanced action is uniform, and the substrate is uniformly divided (the symmetric composition is generally static). The variation in symmetric composition is: pyramid pattern, balance pattern, radiographic composition, etc.
Equilibrium pattern: Place the main shape, non-main shaft is placed on the other side, a balanced action, the bottom-shaped split uneven (equalization pattern generally expressing dynamic content) The pattern of the pattern is: diagonal pattern, arc pattern , Gradient composition, S-form map, L-form map equinox description of the application of the biographic diagram relatively simple, as long as the main part of the object is placed in the picture center, the overall of the object is handled as the border distance, the background bottom is not repeated, is successful Piece. It should be noted that the "picture center" is not an equal center of the picture, which is determined by a person's visual approach. This center is the position determined by the protocol of the gold segmentation, that is, the picture of 1: 0.618, draws four intersections in the screen, which is the "composition center point" near the center of the screen. We can place the main part of the sketch object, to get a beautiful composition.
Part.4 light problem
In sketching or PS painting, how to solve the problem of good light, affect the quality of the map. It is difficult to grasp the sense of space if you can't master the light. Because of the sense of space, the reason for the three-dimensional sensation is because the light is determined.
In the sketch, the light source is basically divided into two types: one is a scattered natural light from the window, and the other is a light.
The lights have a single light and multiple lights. In contrast, the light is easier to master than natural light, because the light of the light is relatively simple and fixed, the light-shaped relationship after the object is irradiated is relatively simple, and the contrast is obvious, and the front-rear relationship is also highlighted. The illumination of natural light is light of light, which makes objects and dark changes, diverse, compared to coordination, is the necessary means of summing training, summarization. Sketch performance natural light, is more difficult than the performance light, so, we must first carry out light training, and then learn from natural light. Of course, we can use and learn the same techniques as in PS paintings. At first we can practice by drawing some simple objects.
It should be noted that in addition to different light sources, the object is light, which is also a factor that causes the different bright and dark changes in the object. When the object is on the front of the object, we call it "smooth light"; when the object is light on the back of the object, we call "backlight"; when the side of the object is light, we call it "side light." The smoothness is relatively easy to manifest, and the backlight is large. The most commonly used light is difficult, differential lights in different directions.
Combined with PS, I will continue to explain it. Similarly, we still start with cubes.
Fig.
It seems that this has a certain three-dimensional feeling, but it is very void. How to make it full, I am here to explain, as an exercise, let everyone do it.
First, let's assume a source and then give it a certain angle.
Fig.10
Next, we can develop a general area of the smooth surface, a backlight surface, a side surface, and a shadow.
Fig.11
On this basis, we have completed all faces more complete.
Fig.12
Of course, some people will say that the 3D filters in the PS can do this, why do you want yourself. Do these purposes, just to complete a practice of projection and light. Although this process looks very simple, how to make the fictional shadow close to the truth is a skilled process.
Now let's take a real thing to do exercises. If you can't find it, you can use the Cloudy Bamboo.
Everyone tried to change this picture to the direction of light and make a shadow.
