Graphics Programs Reference
In-Depth Information
Clouds : A gray-scale map of the clouds
Note that, even if gray-scale, in Cycles all the image textures must be in RGB color
space.
Actually, Cycles can also pretty well handle very big textures, reaching a size of 16
K (that is, 16.000 pixels for the longest side of the image), so you can use them at
the best resolution you can find. In any case, be aware that the bigger the resolution
of the textures, the longer the Cycles' rendering times.
However, besides the texture images, we also have to follow these steps:
1. Start Blender and switch to the Cycles Render engine.
2. Delete the default cube and add a UV Sphere (with the mouse cursor in
the 3D view, press Shift + A and go to Mesh | UV Sphere ). Rename it as
Earth_Surface .
3. With the mouse cursor in the Camera view, press 1 from the numpad to
go in orthogonal front view. Now, go in edit mode, select all the vertexes,
and press U . In the UV Mapping pop-up menu, select Sphere Projec-
tion . Go out of edit mode and press 0 from the numpad to go back again
to the Camera view.
4. Press Shift + D and hit Enter to duplicate the sphere. In the Transform
panel to the right (press N if not already activated), set the Scale value
for X , Y , and Z to 1.001 . Rename it as Earth_Clouds .
5. Duplicate it again, set the scale to 1.002 , and rename it as
Earth_Atmosphere .
6. Add an Empty (press Shift + A and go to Empty | Plain Axes ) and
rename it as Empty_Earth . In the Object Data window, set its size to
2.00 . Select the three UV spheres and then the Empty and press Crtl +
P to parent them to the Empty .
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