tailieunhanh - Mastering Autodesk Maya 2011 phần 2

Độ sâu của trường và chuyển động mờ hai hiệu ứng có nghĩa là để tái tạo các hiện tượng máy ảnh thế giới thực. Cả hai những hiệu ứng này có thể làm tăng tính hiện thực của một cảnh cũng như bộ phim. Tuy nhiên, cả hai đều có thể làm tăng đáng kể thời gian render, | 76 chapter 2 virtual filmmaking with maya cameras New Camera Sequencing Maya 2011 introduces the Camera Sequencer tool which allows you to create a sequence of shots for scenes that use multiple cameras. You can arrange and edit the camera sequence using the nonlinear camera sequence editor which is similar to the Trax Editor. For more information on how to use this feature watch the movie in the BonusMovies folder on the DVD. Applying Depth of Field and Motion Blur Depth of field and motion blur are two effects meant to replicate real-world camera phenomena. Both of these effects can increase the realism of a scene as well as the drama. However they can both increase render times significantly so it s important to learn how to efficiently apply them when rendering a scene. In this section you ll learn how to activate these effects and the basics of how to work with them. Using both effects effectively is closely tied to render-quality issues. Chapter 12 discusses render-quality issues more thoroughly. Rendering Using Depth of Field The depth of field DOF settings in Maya simulate the photographic phenomena where some areas of an image are in focus and other areas are out of focus. Artistically this can greatly increase the drama of the scene because it forces the viewers to focus their attention on a specific element in the composition of a frame. Depth of field is a ray-traced effect and can be created using both Maya software and mental ray however the mental ray DOF feature is far superior to that of the Maya software. This section describes how to render depth of field using mental ray. Depth of Field and Render Time Depth of field adds a lot to render time as you ll see from the examples in this section. When working on a project that is under time constraints you will need to factor DOF rendering into your schedule. If a scene requires an animated depth of field you ll most likely find yourself re-rendering the sequence a lot. As an .