From the FAQ: https://www.galciv3.com/game/faq
- Q: Why don’t you support DirectX 9?
- A: DirectX 10 and 11 allow us to easily have multiple threads touch the graphics card simultaneously. This results in much higher-quality font rendering, makes it a lot easier to support advanced UI scaling, and makes the game less CPU-bound which will be important for giving the artificial intelligence engine more processing power to execute VCSS’s (Very Complex Strategy Simulations). As with the decision to be 64-bit, it allows us to create a better game for the majority of players that already meet the requirements.
From the Game History: https://www.galciv3.com/databanks/game-history/galciv-3
Due to the expected longevity of Galactic Civilizations III, the new engine is strictly 64-bit and DirectX 11. This is to allow the game to continue to be improved and expanded well into the future.
So, will DirectX 10 be supported or not? I have a DirectX 11 card, so I'm not too worried but for those among us with DirectX 10 cards, this is an important question, I'd imagine.