This tutorial will teach you how to create those nice illuminated engine effects that you have probably seen on other users' ships.
The "glowball" is simple, but first you will need to get it. Go here and download the Doodads 1.02 ini file. It has everything you need, which includes the Fraxy_112 "glowball".
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Ok, now we have our test ship. (It's better that in the previous tutorials, but still sucks.)
Dummy Section: A small section meant to be hidden underneath its parent section. Its only purpose is to allow the builder to "depth" a doodad.
These sections were much larger, but I have decreased their "scale" value to make them smaller. It is also important with them selected to hold the "x" key and roll the mouse wheel downward to make sure that they are underneath their parent section.
Alternatively, you could right click the "dummy section" and select "send to bottom" to set them below everything.
This will make them add their RBG to whatever they are over instead of just being drawn over it.
It should then look like this.
It should look like this when you are done making your adjustments.
Here is the completed ship with "dummy sections" buried under their parent sections and "glowballs" in place.