Whee, I finally release a mod that is vaguely usable!
Thought of the idea on the way home from school, so here's the...
COLONY TECH MOD v1.0.0
This mod is designed to curb the cheesy "colony tech trading" that occurs so often in PBW games. It makes colony techs racial-trait-based so a Rock race cannot trade its colony tech with an Ice or Gas race, etc. Note that researched colony techs can still be traded between races with the same planet types - two Rock races can exchange ice or gas tech, for instance. In addition, the colony components for colony techs that are not of one's native planet type are twice as large and expensive, and a 500 kT Ark Ship has been added to hold these colony components (Ship Construction L3).
As of yet, there is no AI for this mod, though it would not be difficult to modify any race AI to use this mod, all that would be required would be changing the research and general files so the AI picks the appropriate racial trait and researches the appropriate tech for its home planet type.
Colony Tech Mod v1.0.0
Threaded Mode