Render a Starship Shield Impact - Blender 2.5 - page 51

F Color stop 2:
Color: 1 Red, 0.24 Green, 0.11 Blue
Posiion: Around 1/3 from let to right (there is no way to specify the
posiion by a number)
Alpha: 1
F Color stop 3:
Color: 1 Red, 0.93 Green, 0.69 Blue
Posiion: Around 60% from let to right
Alpha: 1

The ColorRamp works this way: For every pixel in the input image buffer, map it to
the gradient, if the input pixel color is black, take the leftmost color and alpha from
the gradient but if the input pixel color is white, take the rightmost color from the
gradient. Any gray color in between gets mapped to the appropriate point within the
gradient. Checking the result of the gradient with a Viewer node helps to visualize
this process and understand it. Don't forget to set the Blend type to Cardinal , since
it's important to get a smooth transiion between colors.
The RGB Curves node in the botom just performs a simple liting of brightness
(Color channel), to make the planet more visible and the AlphaOver node in the
left just puts the glow behind the planet.

5. Row C must be set up as shown here:

This is just a simple setup where we put a Render Layer node as input, selecing
the Mother Ship renderlayer and then perform a simple processing with an RGB
Curves node, shown in the previous screenshot separated into four nodes, one for
each channel.