diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index 64143e93..6bf909fb 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -35,7 +35,7 @@ local function register_biomes()
 		node_water_top = "mcl_core:ice",
 		depth_water_top = 2,
 		node_river_water = "mcl_core:ice",
-		node_riverbed = "mcl_core:gravel",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = 1,
 		y_max = mcl_vars.mg_overworld_max,
@@ -53,7 +53,7 @@ local function register_biomes()
 		node_water_top = "mcl_core:ice",
 		depth_water_top = 2,
 		node_river_water = "mcl_core:ice",
-		node_riverbed = "mcl_core:gravel",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = 0,
@@ -98,7 +98,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = -4,
@@ -113,7 +113,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = 1,
 		y_max = mcl_vars.mg_overworld_max,
@@ -127,7 +127,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = 0,
@@ -142,7 +142,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = 1,
 		y_max = mcl_vars.mg_overworld_max,
@@ -156,7 +156,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = 0,
@@ -175,7 +175,7 @@ local function register_biomes()
 		node_water_top = "mcl_core:ice",
 		depth_water_top = 2,
 		node_river_water = "mcl_core:ice",
-		node_riverbed = "mcl_core:gravel",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = 1,
 		y_max = mcl_vars.mg_overworld_max,
@@ -189,7 +189,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = 0,
@@ -232,7 +232,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = 0,
@@ -541,7 +541,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:coarse_dirt",
 		depth_filler = 2,
-		node_riverbed = "mcl_core:coarse_dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = 1,
 		y_max = mcl_vars.mg_overworld_max,
@@ -569,7 +569,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:coarse_dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = -2,
@@ -612,7 +612,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = -2,
@@ -642,7 +642,7 @@ local function register_biomes()
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
 		depth_filler = 3,
-		node_riverbed = "mcl_core:dirt",
+		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = mcl_vars.mg_overworld_min,
 		y_max = 0,