An easy to use 3d outline shader which can be enabled and disabled through a simple parameter.
Simply add the outline.material as the next_pass of the material to which you wannt to apply the outline. If you don't need any exsamples you can delete the TEST folder. Othwise the exsamples in there could be helpful to you.
- enable: you can always turn the outline on or off (useful for marking the object a player is pointing at). For an exsample implementation checkout the Toggle Outline.gd file.
- color: choose the color your outline needs
- thickness: adjust the strength of the outline