1. Ray trace in double resolution and outline rendering mode on
2. Apply Line effect to get thicker lines
3. Scale the result down to 50 % resolution
The result of this process is antialiased outline rendering
The following options are available:
Drawing Channel: The channel to which lines are drawn
Threshold Channel: The channel that triggers drawing
Width Channel: An optional channel which can be used to achieve variable line width. The channel should have a value range between 0 and 1. Channel value 0 produces line width defined by the 'Min. Width' value and channel value 1 corresponds 'Max. Width' value respectively.
Minimal Line Width: Line width values are expressed using percentage of the full image width. Therefore, small values such as 0.1 are usually suitable.
Maximal Line Width: Used if width channel selected.
From and To: Color range which triggers line drawing. For example, if you are rendering black outlines on a white background, the default range (0,0,0) - (0.01, 0.01, 0.01) is suitable. Then only almost black pixels will trigger the effect.