tailieunhanh - LightWave 3D [8] 1001 Tips & Tricks phần 5

các lĩnh vực của bề mặt. Tỷ lệ máy ảnh sẽ đặt các màu sắc trên các cạnh của bề mặt các mặt dốc từ người xem. Máy ảnh Tỷ lệ trông tốt hơn bạn có thể nghĩ rằng bởi vì các cạnh sáng hiển thị tốt hơn trong khu vực là tối hơn. | 232 Chapter 5 Gradients areas of the surface. Camera Incidence will put the color on the edges of the surface where the polygons are sloping away from the viewer. Camera Incidence looks better than you might think because the lighted edges show up better in areas that are darker. There s just a little savings in render time about 4 over using two rim lights with shadows as the only ray tracing option on. But using an incidence angle gradient texture looks better for cartoon-style animation because no matter what angle the surface is to the camera you will always get the same degree of rim lighting. Also you can easily give the edge effect a color without worrying about hot spots when the character moves. Versions 5-8 530 Emanuele Salvucci Gradients Intermediate Sepia-Tones Textures You can easily remap a color texture using gradients and texture layers. To remap an image to sepia tones for instance 1. In the Color channel add a texture using the T button. 2. In the Texture Editor choose and map the image. 3. Add a new layer of type Gradient. 4. Set Input Parameter to Previous Layer. 5. Add a new gradient key by clicking on the gradient ramp. 6. Set the new gradient key to Parameter . 7. Set the color for the key at position 0 to 47 34 0. 8. Set the color for the key at position 1 to 255 222 165. Having set the input parameter to Previous Layer the gradient takes color intensity values from the previous layer and uses them as key parameters. You can remap images using as many keys and colors as you like. Versions 7-8 531 Gerald Abraham Gradients Intermediate Incidence Angle Though the Incidence Angle gradient s most common application is for controlling reflection it can be handy in other situations as well. Applied to the Diffuse channel with a light brown color it can be used to simulate a dusty surface. Versions All 532 Kevin Phillips Gradients Beginner Gradients and Negative Bump Maps An interesting note if you are using gradients with a Bump input .