1. Displacement Mapping
Displacement Mapping is using a texture effect to deform (變形) the mesh
with a cube, go into Edit Mode (tab) and select all verticies,
press the Subdivide button a few times in the Tool Shelf
go to the “Influence” panel and find the “Displacement” button to turn on Displacement and
adjust the slider
used the Cloud texture in Blender

2. Displacement Mapping Example
create a simple
image in a graphics
program using only
simple gray, white
and black shapes
the effects of the image on the object mapped with the Cube wrap

3. Texture image database

4. Setting Up a World Using Color, Stars and Mist
Depending on which release of Blender you’re running, you will either have a black, gray or blue background
Blender gives you some basic options in the World settings. You can control the colors of the top and bottom (Zenith 天際and Horizon地平線), stars, fog( 霧) or mist (霧), clouds and, of course, loading JPEG images

5. World Setting Menu

6. Mist Settings: Depth (depth of mist)
Height (setting to vary fog height)
Intensity (can adjust intensity)
When setting just a straight gradient color for your world, Select the “Blend” option above the color swatches and set the Horizon and Zenith colors.

7. Star Settings: Separation (distance between stars)
Min. Distance (starting distance from camera)

8. Creating a 3D Cloud Backgrounds
Create a world as described previously
Set the Zenith color to white. Keep the Horizon at a blue color (make sure Blend is checked)
Go to the texture buttons and create a new texture using “Clouds”
Go down to the Mapping panel and adjust the Size X and Y sliders

9. Using an Image in the Background
Create a world as described before, then go to the Texture Settings
Select the “Image or Movie” type option and select your image
Go back to the world settings. Take your Zenith color to white and check the Blend button