
I exchanged <Imagevariants > of all Asteroids with <Image imageID="&rsStations1;" imageX="480" imageY="256" imageWidth="32" imageHeight="32" />
Thats a cargo crate.
The marked images are parts of anarchist settlement, about 160 pixels below the cargo crate.
I did some research on this and got a conclusion.
In mining.xml every asteroid with ore has 8 different imagevariants.
For normal asteroids, the images are one over another. (see worlds1.jpg)
While unsing a moded mining.xml file, I entered some systems. In this systems only one image was chosen. On systems I visited before modding, 8 different pictures appeared.
Somehow transcendence rembers that there where 8 different variants and continues to change the y value of the picture by the specified value ("imageHeight="). That way, the anarchist settlement-piece appeared.
It's no bug at all, but I dont know why and how transcendence remebers that there where 8 pics.
btw, about what I wanted to test by this mod (slight spoilers):
I wanted to know how the value after (intAsteroidOnMining ###) affects the mining. For most asteroids I needed to hit them with 1 or 2 plasma torch bursts, but some others also needed 5 to 10 before some ore appeared.