Classic composition generator

[Taugeshtu]

Code:

[Seed]
HeightGen=Flat
Seed=415913080

This is wrong. HeighGen should be in [Generator] section. Try following:

Code:

[SpawnPosition]
X=39.000000
Y=256.000000
Z=203.000000

[GameMode]
GameMode=1

[Storage]
Schema=Default

[Seed]
Seed=415913080

[Generator]
BiomeGen=Constant
ConstantBiome=Plains

HeightGen=Flat
FlatHeight=5
CompositionGen=Classic
ClassicSeaLevel=0
ClassicBeachHeight=-1

Structures=
Finishers=

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And don't forget to regenerate world! (clear world folder except world.ini or use ChunkWorx plugin)