World Creator
Generate entire worlds
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World Creator supports large planet generation, tile and height editing. Most interesting feature is its saving model - one planet that would otherwise require terabytes of data could be stored in less than a few megabytes.
Instead of using height maps for low level details, World Creator uses large triangular tiles. Triangular tiles are optimal because they are always co-planar and fit every terrain well. With only three sides is is much easier to create complex tile sets.