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Các điều khiển trong các ưu đãi 3D (hiển thị trong hình 7.1) cho phép bạn điều chỉnh những kinh nghiệm dựng hình tương tác. Các trạng thái mặc định của các điều khiển cho phép hiệu suất tối đa trong quá trình tương tác, và trong phần này chúng tôi mô tả những cách thức và lý do để thay đổi nó. | Performance Settings and Optimization 7.3. Interactive Rendering Interacting rendering is the rendering that occurs during operations where the mouse button is down in the upper right corner of the 3D preferences. The controls in the 3D preferences shown in Figure 7.1 allow you to tune the interactive rendering experience. The default state of these controls allows for maximum performance during interaction and in this section we describe the ways and reasons to change it. 7.3.1. OpenGL on by default In this mode during interaction rendering always switches to OpenGL mode even if rendering quality in the 3D panel is set to one of the Ray Trace options. This allows for better performance but will turn off Ray Tracer-only effects such as shadows. 7.3.2. Allow Direct To Screen on by default With this on OpenGL rendering will bypass the Photoshop layer blending mechanism and render the result directly to screen during interaction. This setting allows for maximum possible speed and fully uses GPU acceleration. 7.3.3. Auto-Hide Layers on by default If enabled all other layers and the current 3D layer s Layer Effects are turned off during interaction and the final composite is only displayed on mouse-up. If disabled Photoshop blending is active during interaction and while 3D rendering is still performed with OpenGL compositing overhead may result in a noticeable performance decrease Auto-Hide Layers for Performance can also be turned on and off from the 3D menu in Photoshop Figure 7.3 . FIG 7.3 Auto-Hide Layers can be turned on from the 3D menu to maximize performance and GPU acceleration. 7.3.4. Ray Tracer off by default This setting forces ray tracing during interaction which will result in a significant performance reduction depending on the number and speed of your computer s cores. Shadows Reflection and Refraction are effects that can be individually turned on or off when choosing the Ray Tracer for interaction. Each effect will cumulatively slowdown performance so
