How to define starting part?

[Fiddlestyx]

What defines whether a part can be the first one or not?

[OrbitusII]

It's the attachment rules in the config files. I believe that you have to be able to use the part nodes and surface attach things to it (example: structural plates– they have nodes and surface attachment).

[Talisar]

This is complete speculation, as I am a total beginner at making parts for KSP, but I believe it is most likely the line in the cfg that says "module =" . I assume some types are allowed to be first while others aren't based on the part type there.

Or what he said... that makes more sense than my guess

[OrbitusII]

http://forum.kerbalspaceprogram.com/entry.php/350-Seats-Pods-and-Other-Parts

That's HarvesteR's blog post about it.

So, now when you have zero parts in your editor build area, the editor logic files the "rootPartsOnly" filter, which sets a requirement for parts, saying only parts that allow both stacking and surface attachment are valid.

So it's not the part or partModule, but rather the attachment rules. Hope this helps

[Fiddlestyx]

Thank you, that fixed it.