That's one reason why I'm doing Gem slowly in stages. I'm giving everyone a chance to play the core G&K. I know because of time/finances not everyone buys new games right away. I hurried Civup out the door just because there's some interface enhancements I can't live without, like on-map promotion icons or the trade overview screen. Syrian removed and replaced the basic natural wonder placement code in the expansion. The G&K system is much better than the vanilla system, but I need to start from scratch to improve it again. It's a low priority right now. I'll give examples with iron: Vem places a total of 5 iron per player territory (land closer to our capital than others). Iron clusters near hilly, desert, snowy, and militaristic-CS areas within each territory. Deposit size is random, so the deposit sizes within a territory might be [1,2,2] or [3,2] or [1,4]. Gem will scatter 3-8 iron per player territory, similar to Vem, but with a random quantity per territory. Vanilla and G&K place 1 iron deposit per 84 hill tiles, ignoring player and terrain distribution. It does a similar ratio for deserts and snow. Each deposit has 2-8 iron which does not consider any factors (purely random). @glider1 We have variables to control AI prioritization of coastlines, rivers, etc.