Tạo ra một khối lượng 3D Các tùy chọn âm lượng 3D được sử dụng để tạo đối tượng 3D trong tập tin hình ảnh được lát đối tượng 3D, chẳng hạn như một số DICOM các tập tin được tạo ra bằng cách lát trong trung tâm của một hình ảnh. | Chapter 22 Creating and Manipulating 3D Objects Note Your image doesn t have to be in grayscale for this to work. Photoshop uses the green channel to create a depth map. This type of 3D object is great for creating textures or another unique look for an image file. They also can be used to create planes from elevation maps or to save and recreate planes from one 3D modeling file to another. A simple image file can quickly become a mountain range as seen in Figure . FIGURE Using an image to create a depth map can quickly create interesting planes. Creating a 3D volume The 3D volume option is used to create 3D objects out of image files that are slices of 3D objects such as several DICOM files that are created by taking slices out of the center of an image. Using this option allows you to create a 3D object from the image layers that can be moved manipulated and viewed from all angles giving you a versatile way to view these medical images. Creating 3D Objects in the Layers Panel The layers of a 3D object are more complicated than most images. When you open a 3D object in Photoshop unless that object doesn t contain any textures at all you have at least one sublayer listed under a textures heading. On top of that every filter you can add or edit you can make to a 3D object that involves the Layers panel in one way or another. It doesn t take very many changes to add several layers to a 3D file or composite. Don t panic yet Like a well-organized filing cabinet the Layers panel is a clean and efficient way to organize your effects and filters. Figure shows the Layers panel after creating a ring by using the 3D shape from the layer option. The thumbnail of a 3D layer is distinctive. It includes the icon of a three-dimensional cube in the corner in addition to the thumbnail of the actual 3D object. This indicates that the 3D menu is active and the 3D tools can be used on this layer. 713 Part VII Working with 3D Images FIGURE A 3D layer in the .
