Creating a picture is as simple as generating a terrain, adding features and meteorological effects, and taking snapshots.

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You can view maps in terrain or satellite and utilize GPS with altitude reading and position mapping features.

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Curiosity's "visual odometry" software measures terrain features -- such as rocks, rock shadows and patterns in the rover tracks -- to determine the precise distance between drive steps.

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When both parts are out, the additions will include such features as non-player characters, villages, dungeons, more varied terrain, and new combat mechanics.

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