diff --git a/mods/default/nodes.lua b/mods/default/nodes.lua
index 1ebb3417..76b95a41 100644
--- a/mods/default/nodes.lua
+++ b/mods/default/nodes.lua
@@ -864,7 +864,7 @@ minetest.register_node("default:water_source", {
 			},
 		},
 	},
-	alpha = 191,
+	use_texture_alpha = "blend",
 	paramtype = "light",
 	walkable = false,
 	pointable = false,
@@ -909,7 +909,7 @@ minetest.register_node("default:water_flowing", {
 			},
 		},
 	},
-	alpha = 191,
+	use_texture_alpha = "blend",
 	paramtype = "light",
 	paramtype2 = "flowingliquid",
 	walkable = false,
@@ -955,7 +955,7 @@ minetest.register_node("default:river_water_source", {
 			},
 		},
 	},
-	alpha = 160,
+	use_texture_alpha = "blend",
 	paramtype = "light",
 	walkable = false,
 	pointable = false,
@@ -1005,7 +1005,7 @@ minetest.register_node("default:river_water_flowing", {
 			},
 		},
 	},
-	alpha = 160,
+	use_texture_alpha = "blend",
 	paramtype = "light",
 	paramtype2 = "flowingliquid",
 	walkable = false,
@@ -1229,6 +1229,7 @@ local function register_sign(material, desc, def)
 		sunlight_propagates = true,
 		is_ground_content = false,
 		walkable = false,
+		use_texture_alpha = "opaque",
 		node_box = {
 			type = "wallmounted",
 			wall_top    = {-0.4375, 0.4375, -0.3125, 0.4375, 0.5, 0.3125},