What's this?
This effect is an ®evolution of the RainbowRadial.cs provided with the CodeLab.
This is quite similar to the Radial Colors
http://forums.getpaint.net/index.php?showtopic=7181
How does it works?
The effect uses the formulas based on sinusoid curves to define and mix in a rainbow twist the three basic color Red, Green, Blue.
The User interface
This plugin is added to the menu Effects, submenu Texture.
EDIT: I've created a similar plugin but with less options and so a shorter UI

A scrollbar appears if the UI is too long for your screen
...X/Y Factor: quantity of periods on X/Y axis.
...Angles: Set the angle reference per color.
...X/Y offset of the center: as it says...
...Reverse the rotation for R/G/B: as it says, again...
...Amount of R/G/B: adjust the weight per color.
...Ratio: This ratio affects the overall period: 100=1 period.
...Limit level for the lines: When the formulas give a result below the limit, the value used for the color is the amount from the slider. This makes a cut in the colored gradients.
...Lines background: Off, change the alpha value instead the color if the formulas give a result below the limit level.
Download the DLL
Plugin RainbowTwist.dll
Here is the DLL
The source is available with the plugins package!
http://forums.getpaint.net/index.php?showtopic=7186
How to install?
Close Paint.net
Unzip and place the DLL in your Effect folder usually: C:/Program Files/Paint.NET/Effects
Enjoy the colors!


















