Adobe 62000112DM User Guide - Page 419
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ADOBE ACROBAT 3D VERSION 8 412 User Guide 3D preferences In the 3D panel of the Preferences dialog box-Edit > Preferences (Windows) or Acrobat > Preferences (Mac OS)- you can determine whether the 3D toolbar and Model Tree are displayed by default. You can also specify a default renderer and determine whether animations are allowed. Preferred Renderer Specifies the rendering engine used to affect both performance and quality, so it's important to select the appropriate renderer. Depending on your system, you may want to change your render engine. For Windows XP, you may be able to select DirectX 8, DirectX 9, or Software. For Mac OS 10.3 or later, you can select OpenGL or Software. If you select a DirectX or OpenGL option, all rendering takes place using the graphics chip on the video card. If Software is selected, rendering may take more time, but the performance may be more consistent with that of the model in its originating application. Enable Double-Sided Rendering Some model parts have two sides. To save time and space, you can deselect this option to render only the side facing the user. If the user looks inside a part rendered with only one side, the back side would be invisible. Preferred 3D PMI Rendering Mode Specifies the PMI mode to use for rendering. You can select one of the following options: Use Content Setting-The rendering of the PMI uses the setting of each PMI to decide whether or not it uses the Zbuffer. Always Render 3D PMI In Front Of Model-The rendering of the PMI ignores the Z-buffer regardless of the setting in the file. Always Render 3D PMI Using Z-buffer-The rendering of the PMI always turns on Z-buffer regardless of the setting in the file. Enable Hardware Rendering For Legacy Video Cards Forces the use of a hardware accelerator for even video cards that do not support a pixel shader. Open Model Tree On 3D Activation Determines whether the Model Tree is displayed when the 3D model is activated. Choose Use Annotation's Setting to use whichever setting the author used when adding the 3D model to the PDF. Default Toolbar State Determines whether the 3D toolbar is shown or hidden when a 3D model is activated. Choose Use Annotation's Setting to use whichever setting the author used when adding the 3D model to the PDF. Enable Toggle For 3D Toolbar Control Places a triangular button over the selected 3D model that hides or displays the 3D toolbar. Enable 3D Selection For The Hand Tool Lets the user select and highlight parts of the 3D model using the Hand tool. If this option is not selected, use the Object Data tool (Tools > Object Data > Object Data Tool) to select the object. Consolidate 3D Tools On The 3D Toolbar Selecting this option places the manipulation and navigation tools under the Rotate tool, thereby shortening the 3D toolbar. Enable View Transitions Some 3D models include animated transitions between views. Deselect this option if you want to prevent this 3D animation. Optimization Scheme For Low Framerate Specifies what happens to animations of complex models when the framerate becomes low. None does not compromise the visuals and leaves the framerate low. Bounding Box shows the three-dimensional planes enclosing the parts instead of the parts themselves, which keeps the framerate high. Drop Objects does not show some parts of the model in order to keep the framerate high.