The game engine appears strong according to the demo, but the data would be too much if simulating the real perfectly, also the players' actions are actually in the sky, so the ground would be seldom reached. Let's say such a scene: the estimated battle range is less than 400 sq.km, and the fort may be set up on various landforms such as top of a mountain, cliff side, gorge, inside a gorge cliff, desert, floating platform on a sea, basin, plain, virgin forest, behind a large fall, underground grotto, the fighters chase one another attacking, or work with gunboat for mastery of the sky.Bombers/fish torpedo boats destroy the opponent defenses. And the fort's defense fire lighten the sky. The commander's guide lights lead the long-range attacking vessels on the track to fire, simultaneously the ground track cannons fire too. Metal debris slide down from the track.
So there's no need to perfectly simulate the landforms at all, when a fort/city is to be built, the landforms will be formed on an appropriate land according to a player's operation, thus those landforms is suggested to be refined, because the player's most actions are focused within the territory.
Look at it from the demonstration of the game engine strong, but if the full amount of simulation data that is too large, and the player on the planet in the range of activities is still in the air. Basically, the ground is not, we can imagine such a scene. one (or a group) to establish a fortress for the player being another city (or a group) to attack the player. expected operational range not more than 400 square kilometers, the fortress may be established in (the Peak, the edge of the precipice, Canyon, Canyon walls, desert, ocean floating platform basin, plains, forests, and large waterfalls, underground caverns), a variety of terrain, bite each other fighters of the last attack, and support aircraft gunboat seize control of the skies and bombers / torpedo planes to destroy the enemy's defensive fortifications, To match the firepower of the defense put all illuminate the sky, Commander of the guide beam guide rail on the long-range fire support ship's gun attack, and ground artillery also fired on track, keep the metal wreckage fall from orbit...
So there is no need to completely simulation planet topography, building fortifications when the player / city, Players will choose a suitable surface in the planet forming zone topography, the terrain this can be done relatively sophisticated, because of the player's main activities are concentrated in this region.
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