Oh i see now,

Thanks you very much to both of you.

edit : well ... i must miss something ... i supposed that an entity ghost should inherit some data from "inner" entity (like picture at least) .... it seems not ....
i'm still unable to spawn this damn ghost ^^
i'm pretty sure it's a silly mistake ...

Hi,

sorry in advance for my bad english.

I try to write my first mod for factorio : it will ask the player to build a custom assembly machine at a random place on the map. Which should be the only spot where it can be build.

So far i was able to create my custom assembly machine and a new ore to ...