Hola my fellow modders I was just messing around, trying to create a custom naval civilization, with the emphasis on coastal cities. I therefore wanted to give them a bonus yield on ocean squares, with several buildings to improve upon this. However, I can't seem to get this to work. Here's the last thing I tried: Code: <GameData> <Traits> <Row> <Type>TRAIT_COMMERCE</Type> <Description>TXT_KEY_COMMERCE</Description> <ShortDescription>TXT_KEY_TRAIT_COMMERCE_SHORT</ShortDescription> </Row> </Traits> <Trait_SeaPlotYieldChanges> <Row> <TraitType>TRAIT_COMMERCE</TraitType> <YieldType>YIELD_GOLD</YieldType> <Yield>1</Yield> </Row> </Trait_SeaPlotYieldChanges> </GameData> I'm guessing it's because there's no similar trait in the game and making one is a lot less simple than I thought it would be I could of course come up with a different way of bolstering sea resources (like the lighthouse and seaport already do), but I was still wondering if this really can't be done or if I'm just not seeing something here. Any help would be appreciated.