Make ice slippery

mods/default/nodes.lua

@@ -560,7 +560,7 @@ minetest.register_node("default:ice", {
 	tiles = {"default_ice.png"},
 	is_ground_content = false,
 	paramtype = "light",
-	groups = {cracky = 3, puts_out_fire = 1, cools_lava = 1},
+	groups = {cracky = 3, puts_out_fire = 1, cools_lava = 1, slippery = 3},
 	sounds = default.node_sound_glass_defaults(),
 })
 

mods/stairs/init.lua

@@ -765,7 +765,7 @@ stairs.register_stair_and_slab(
 stairs.register_stair_and_slab(
 	"ice",
 	"default:ice",
-	{cracky = 3, puts_out_fire = 1, cools_lava = 1},
+	{cracky = 3, puts_out_fire = 1, cools_lava = 1, slippery = 3},
 	{"default_ice.png"},
 	"Ice Stair",
 	"Ice Slab",