Recognize Basic Rendering Techniques

OBJECTIVE: V106.03 Recognize basic rendering techniques.

Introduction: The purpose of this unit to introduce students to the basics of rendering techniques used in 3D modeling.

A. Rendering and ______Techniques (called Algorithms) 1. Rendering produces a finished ______. a. The ______the rendering is to creating a ______scene, the more complex it is, and the longer it takes to ______the scene. b. Rendering the scene to a ______may include such things as the background, ______, compressions, file type, and output path. c. Rendering ______are small and quick to check your scene prior to doing a full render. B. ______Mapping 1. Surfaces may have single colors or they may have ______color patterns, which are commonly referred to as ______For example, wood has a characteristic appearance because of its varying color ______. Even materials like ______which seen to be one color, when closely examined, reveal varying shades and colors mixed in random patterns. 2. The term texture in ______computer graphics refers to image patterns rather than the “feel” of materials. 3. The most basic type of texture is a 2D ______(often saved as a .jpeg, .bmp or .tga files), which is applied to an object. 4. ______maps control whether a material is opaque, transparent, or translucent. 5. Adding textures to the object is an extremely important part of making objects look ______6. ______may be acquired in different ways. a. Most 3D programs come with ______where you can select various materials and patterns. b. Typically, 3D programs allow materials to be ______to the library. 1. ______materials can be made by ______existing library selections and sometimes using “mixing formulas” (blending) provided by other 3D artists. 2. There are graphics ______designed for creating 2D textures (such as CorelDraw or PhotoShop) that can be found on the Internet or through software suppliers.

7. UV space a. UV ______is a way of trying to solve the distortion problems that occur when applying image maps (textures) to complex surfaces. b. Many 3D graphics programs allow ______image scaling and placement controls. c. U represents the ______component of an image. It corresponds to the X axis dimension in 2D coordinate space. d. V represents the ______component of an image. It corresponds to the Y axis dimension in 2D coordinate space. e. By applying UV ______and placement restraints, the most appropriate fit of the image can be obtained. f. By manipulating ______controls, it also possible to apply textures to parts of surfaces as well as an entire surface. g. ______allows the pattern to be repeated, much like tiles on a floor. C. ______Mapping (bump texture mapping) 1. Bump maps simulate the roughness of surfaces even though the surfaces are perfectly ______Bump maps make an object appear to have a bumpy or irregular surface. This is possible because higher areas are light and lower areas are ______2. Surface roughness might include the unevenness of a ______surface, the weave of a fabric, or the bumpiness of an orange. 3. The process of creating artificial roughness takes less computing ______than actually dividing the surface into large numbers of polygons and moving the vertices of those polygons up or down to create a real roughness. 4. Settings allow the user to determine the height and depth of ______. 5. Bump maps can be produced by photographing ______, scanning images and actual materials, or by using software programs to draw patterns in grayscale. D. Lighting 1. 3D programs have some type of ______lighting, which can be changed to create a more realistic appearance. 2. There are several common ______of CG (computer graphics) lights.