Artistic design and treatment of the background in

The artistic design and treatment of the background in the packaging effect picture

the background is an important part of the packaging effect picture, which is used to foil the theme, foil the atmosphere and enhance the artistic expression of the picture

first, the artistic design of the background

different backgrounds will produce different artistic effects, and the tone, brightness and pattern of the background mainly depend on the expression intention of the designer

used to set off the background of packaging modeling. Generally, the color tone is relatively single, and it should not be too bright and bright, so as not to dominate. Usually, neutral tone backgrounds such as black, white and gray are used to set off brightly colored packages, while colored backgrounds are used to set off neutral colored packages. In addition, the background used to create the atmosphere is determined by different customs and people's psychological feelings. For example, red and yellow will produce a warm, festive and peaceful atmosphere, which is suitable for the packaging background of festive items such as alcohol, while blue gives people a sense of tranquility and coolness, which is suitable for the packaging background of drugs, cold drinks, etc

in addition to setting off the atmosphere and packaging modeling, the background is also commonly used to further publicize the packaging contents and create special effects, such as conveying more information about the contents to consumers through words and pictures, or attracting consumers' attention with visually striking pictures

the commonly used additives are plasticizers, stabilizers, lubricants, fillers, colorants, solvents, etc. the design of scenery includes art design and technical treatment. The above briefly introduces the general principles of art design, and the following focuses on the setting method of background in AutoCAD from a technical point of view

II. Background processing technology

background setting in AutoCAD is carried out through the background button of the render toolbar, and then the background dialog box pops up, which contains four types of backgrounds: monochrome background, gradient background, image background and merged background

1. Monochrome background

select solid in the background dialog box, click the AutoCAD background check box in the colors bar, and cancel this option. At this time, the items in the colors bar change from gray to black, and you can set the color

there are two ways to set the color. One is to select RGB (red, green, blue) color system or HLS (hue, brightness, saturation) color system in the drop-down menu of color system, and adjust the color by moving the three sliders below it. The other method is to adjust it through the selec custom color button. After clicking this button, the "color" dialog box pops up. Select the basic color, and adjust its red, green, and blue components and hue, brightness, and saturation to generate the desired monochrome background

2. Gradient background

gradient background is composed of 2 or 3 colors, which are divided into upper, middle and lower layers. You can set the gradient background by selecting gradient in the background dialog box. Click the color samples after top, middle and bottom respectively in the colors bar, and then set the colors of the upper, middle and lower layers respectively according to the method of setting monochrome background. Gradient background

in the default state, the color patches are arranged horizontally with equal width, and the height position of each layer of color patches can be adjusted through the horizon slider; The height slider is used to control the width of the middle-level color block. When its value is zero, the middle-level color disappears and becomes a two-color gradient; The rotation slider is used to change the arrangement angle of colors to generate a rotating gradient background

click the preview button to preview the gradient setting effect

3. Image background

image background is to take the image file saved by the user in advance as the background of the rendering effect (see Figure 4) to solve this problem for everyone!, This method can make the background at will, which is the most used background type when designing packaging renderings. The image files that can be used are bmp、. jpg、. gif、. pcx、. png、. TGA and TIFF and other formats. Select image in the background dialog box, first click the find file button in the image column, and then select the image file to be used as the background in the pop-up background image dialog box; Then adjust the size, position and arrangement of the image through the adjust bitmap button

4. Merge background

merge background is to use the last rendering result as the background of this time. This rendering result includes not only the last set background, but also the object drawn by the user. Even if the object has been moved or erased in the next rendering, the object can still be seen in the new rendering result, because the object has been merged into the background

select merge in the background dialog box, that is, use the merge background function setting. However, when using the merged background, it should be noted that this setting is only effective if the previous rendering result is not cancelled. If the screen is refreshed by executing zoom, pan and other display control commands or regeneration commands, the rendered background will not contain the graphics merged into the background after the previous rendering, that is, the previous background setting is still used

5. Background reflection

in any background type, the color or image of the background can be reflected by the surface of the object, but the object must be given a material with reflection properties. By default, the use background check box in the environment bar of the background dialog box is selected, and the rendered object is the reflection background. When this check box is deselected and an image file name is not entered in the name input box, the object does not reflect the background. When the use background check box is deselected, you can also specify an image file through the find fibaylend fr flame retardant polycarbonate ABS (acrylonitrile butadiene styrene) mixture is an ideal material for battery seats and battery modules Le button, so that objects with reflective material properties do not reflect the background but reflect the image specified here. The reflected background image can be selected at will, regardless of the type, color and image of the background. However, in order to obtain a more realistic reflection effect, the object is generally made to directly reflect the background image

6. Get the rendering effect picture

AutoCAD provides three rendering methods: render (general rendering), photo real (photo realistic rendering), photo raytrace (photo raytrace rendering). Four types of backgrounds can be rendered in any way, but there must be graphic entities when rendering, otherwise rendering has no effect. In addition, since the material and scenery can only be rendered in photo real and photo raytrace modes, the effect after setting the background should also be rendered in these two modes

III. conclusion

in order to achieve a harmonious and unified design effect, we need to comprehensively consider various factors. In addition to considering the relationship between the tone of the background, content and expression intention, we should also consider the coordination of the background and light. Especially when selecting the image background, the brightness and light direction of the background must be consistent with the light brightness and light direction set by the user, so as to make the whole picture an organic whole

source: Printing Technology