(Photoshop sẽ không cho phép bạn chuyển đổi từ chế độ đa kênh CMYK với ít hơn bốn kênh.) 4. Nhấn Ctrl + I. Thật không may, các kênh mới đi lên đen, mà sẽ làm cho toàn bộ hình ảnh màu đen. Để thay đổi nó để trắng, nhấn Ctrl + I hoặc chọn ảnh ➪ Điều chỉnh ➪ Đảo ngược. 5. Chọn ảnh ➪ Chế độ ➪ CMYK. Hình ảnh trông rửa sạch và tối chút chút so với ban đầu RGB của nó | 282 Part II Painting and Retouching Figure 7-16 Select a pattern from the drop-down palette and then click or drag with the pattern stamp tool. Figure 7-17 shows an example of how you can apply repeating patterns. I selected the single apartment window labeled in the figure and chose Edit Define Pattern. I then painted with the pattern stamp tool at 80 percent opacity over the horse and rider statue. Aligning patterns or not As is the case with the rubber stamp the Options bar for the pattern stamp tool provides an Aligned check box. If you select the check box Photoshop aligns all patterns you apply with the stamp tool regardless of how many times you start and stop dragging. The two left examples in Figure 7-18 show the effects of selecting this option. The elements in the pattern remain exactly aligned throughout all the brushstrokes. I painted the top-left image with the Opacity value set to 50 percent which is why the strokes darken when they meet. To allow patterns in different brushstrokes to start and end at different locations turn the Aligned option off. The point at which you begin dragging determines the position of the pattern within each stroke. I dragged from right to left to paint the horizontal strokes and from top to bottom to paint the vertical strokes. The two right examples in Figure 7-18 show how nonaligned patterns overlap. Note As discussed in Chapter 6 you can also apply a pattern to a selected portion of an - image by choosing Edit Fill and selecting the Pattern option from the Use pop-up menu. If you have an old grayscale image saved in the Photoshop 2 format sitting around you can alternatively choose Filter Render Texture Fill to open the image and repeat it as many times as it takes to fill the selection. Texture Fill is intended primarily for preparing textures and bump maps for a three-dimensional drawing program so most folks never touch this filter. Chapter 7 Retouching Repeating and Restoring 283 Pattern tile Figure 7-17 After .
