Nice mod! But I check the server log of Cave, it seems that it even check some entities in Cave and spawned them which should not be in Cave. Such as mermhouse, beefalo,etc.
Log here:
[00:01:13]: [Simple Regrowth]
[00:01:13]: ...world: w: 450, h: 450, square length: 202500
[00:01:13]: ...spawner: grass: maxcount: 103, amount: 6, current: 439
[00:01:13]: ...spawner: tentacle: maxcount: 304, amount: 17, current: 114
[00:01:13]: ...spawner: mermhouse: maxcount: 13, amount: 2, current: 0
[00:01:13]: ...spawner: houndbone: maxcount: 35, amount: 4, current: 8
[00:01:13]: ...spawner: skeleton: maxcount: 24, amount: 2, current: 8
[00:01:13]: ...spawner: flower: maxcount: 282, amount: 28, current: 0
[00:01:13]: ...spawner: red_mushroom: maxcount: 41, amount: 2, current: 92
[00:01:13]: ...spawner: oasis_cactus: maxcount: 24, amount: 3, current: 0
[00:01:13]: ...spawner: sapling: maxcount: 69, amount: 4, current: 73
[00:01:13]: ...spawner: berrybush_juicy: maxcount: 35, amount: 4, current: 7
[00:01:13]: ...spawner: berrybush: maxcount: 69, amount: 4, current: 10
[00:01:13]: ...spawner: mandrake_planted: maxcount: 7, amount: 2, current: 0
[00:01:13]: ...spawner: fireflies: maxcount: 113, amount: 6, current: 29
[00:01:13]: ...spawner: reeds: maxcount: 35, amount: 4, current: 41
[00:01:13]: ...spawner: catcoonden: maxcount: 7, amount: 2, current: 0
[00:01:13]: ...spawner: rock_avocado_bush: maxcount: 35, amount: 2, current: 0
[00:01:13]: ...spawner: bullkelp_beachedroot: maxcount: 35, amount: 4, current: 0
[00:01:13]: ...spawner: blue_mushroom: maxcount: 24, amount: 2, current: 228
[00:01:13]: ...spawner: green_mushroom: maxcount: 41, amount: 2, current: 113
[00:01:13]: ...spawner: livingtree: maxcount: 7, amount: 2, current: 0
[00:01:13]: ...spawner: beehive: maxcount: 18, amount: 4, current: 0
[00:01:13]: ...spawner: cactus: maxcount: 24, amount: 3, current: 0
[00:01:13]: ...spawner: beefalo: maxcount: 5, amount: 2, current: 0
[00:01:13]: ...spawner: tallbirdnest: maxcount: 9, amount: 2, current: 0
[00:01:13]: ...spawner: rocks: maxcount: 1123, amount: 56, current: 21
[00:01:13]: ...spawner: marsh_bush: maxcount: 69, amount: 6, current: 168
[00:01:13]: ...spawner: marsh_tree: maxcount: 69, amount: 6, current: 14
[00:01:13]: Validating portal[5] <-> 1[5] (inactive)
[00:01:13]: Validating portal[6] <-> 1[6] (inactive)
[00:01:13]: Validating portal[4] <-> 1[4] (inactive)
[00:01:14]: Gameserver logged on to Steam, assigned identity steamid:90140321718117387
[00:01:17]: About to start a shard with these settings:
[00:01:17]: ShardName: Caves
[00:01:17]: ShardID: 1423558479
[00:01:17]: ShardRole: SECONDARY
[00:01:17]: MasterHost: 127.0.0.1
[00:01:17]: MasterBind: (null)
[00:01:17]: MasterPort: 10888
[00:01:17]: [Shard] Connecting to master...
[00:01:17]: [Shard] Sending secondary shard information to master...
[00:01:34]: [Simple Regrowth] Spawned 5x of tentacle at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 1x of mermhouse at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 15x of flower at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 4x of berrybush_juicy at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 3x of berrybush at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 1x of mandrake_planted at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 1x of livingtree at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 3x of beehive at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 1x of beefalo at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 2x of tallbirdnest at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 6x of rocks at seg 16 (tick: 480) of day 181
[00:01:34]: [Simple Regrowth] Spawned 6x of marsh_tree at seg 16 (tick: 480) of day 181