diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/defs/item/ItemDescriptor.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/defs/item/ItemDescriptor.kt
index f915c663..2a76eb09 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/defs/item/ItemDescriptor.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/defs/item/ItemDescriptor.kt
@@ -214,7 +214,7 @@ data class ItemDescriptor(
 
 			return ref.type.factory(ref, jConfig, jParameters, count)
 		} catch (err: Throwable) {
-			LOGGER.error("Error while generating randomized item '$name' using script $builder", err)
+			LOGGER.error("Error while building item '$name' using script $builder", err)
 			return ref.type.factory(ref, ref.json, parameters.deepCopy(), count)
 		}
 	}
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/defs/tile/TileDefinition.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/defs/tile/TileDefinition.kt
index 704f9971..5c4a55be 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/defs/tile/TileDefinition.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/defs/tile/TileDefinition.kt
@@ -50,7 +50,7 @@ data class TileDefinition(
 	val cascading: Boolean = false,
 	val falling: Boolean = false,
 	val foregroundOnly: Boolean = collisionKind != CollisionType.BLOCK,
-	val supportsMods: Boolean = !(falling || !cascading || collisionKind != CollisionType.BLOCK),
+	val supportsMods: Boolean = !(falling || cascading || collisionKind != CollisionType.BLOCK),
 	val blocksLiquidFlow: Boolean = collisionKind.isSolidCollision,
 ) : IRenderableTile, IThingWithDescription by descriptionData {
 	init {
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/defs/world/TerrainSelectorParameters.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/defs/world/TerrainSelectorParameters.kt
index de91509a..fbf4f5de 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/defs/world/TerrainSelectorParameters.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/defs/world/TerrainSelectorParameters.kt
@@ -12,7 +12,7 @@ data class TerrainSelectorParameters(
 	val baseHeight: Double,
 	val worldHeight: Int = 0,
 	val seed: Long = 0L,
-	val commonality: Double = 0.0
+	val commonality: Double = 1.0
 ) {
 	fun withSeed(seed: Long) = copy(seed = seed)
 	fun withCommonality(commonality: Double) = copy(commonality = commonality)
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/world/terrain/RidgeBlocksTerrainSelector.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/world/terrain/RidgeBlocksTerrainSelector.kt
index 33ecc58d..c4551857 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/world/terrain/RidgeBlocksTerrainSelector.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/world/terrain/RidgeBlocksTerrainSelector.kt
@@ -74,8 +74,8 @@ class RidgeBlocksTerrainSelector(data: Data, parameters: TerrainSelectorParamete
 		if (parameters.commonality <= 0.0) {
 			return 0.0
 		} else {
-			val x = perlin[x.toDouble(), y.toDouble()]
-			val y = perlin[y.toDouble(), x]
+			val x = x + perlin[x.toDouble(), y.toDouble()]
+			val y = y + perlin[y.toDouble(), x]
 			return (ridge1[x, y] - ridge2[x, y]) * parameters.commonality + data.bias
 		}
 	}
diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/world/terrain/WormCaveTerrainSelector.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/world/terrain/WormCaveTerrainSelector.kt
index dcd63ebc..149c359d 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/world/terrain/WormCaveTerrainSelector.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/world/terrain/WormCaveTerrainSelector.kt
@@ -96,31 +96,34 @@ class WormCaveTerrainSelector(data: Data, parameters: TerrainSelectorParameters)
 					else
 						1.0
 
-					wormRadius *= taperFactor
+					//wormRadius *= taperFactor
 
 					// carve out worm area
-					val size = ceil(wormRadius)
-					var dx = -size
-					var dy = -size
+					if (wormRadius >= 1.0) {
+						val size = ceil(wormRadius)
+						var dx = -size
+						var dy = -size
 
-					while (dx <= size) {
-						while (dy <= size) {
-							val m = sqrt(dx * dx + dy * dy)
+						while (dx <= size) {
+							while (dy <= size) {
+								val m = sqrt(dx * dx + dy * dy)
 
-							if (m <= wormRadius) {
-								// TODO: maybe roundToInt()?
-								val x = (dx + worm.pos.x).toInt()
-								val y = (dy + worm.pos.y).toInt()
+								if (m < wormRadius) {
+									// TODO: maybe roundToInt()?
+									val x = (dx + worm.pos.x).toInt()
+									val y = (dy + worm.pos.y).toInt()
 
-								if (isInside(x, y)) {
-									this[x, y] = this[x, y].coerceAtLeast(wormRadius - m)
+									if (isInside(x, y)) {
+										this[x, y] = this[x, y].coerceAtLeast(wormRadius - m)
+									}
 								}
+
+								dy += 1.0
 							}
 
-							dy += 1.0
+							dy = -size
+							dx += 1.0
 						}
-
-						dx += 1.0
 					}
 
 					// move the worm, slowing down a bit as we