Fix transparency of vapors.

demon.lua

@@ -1,15 +1,17 @@
 
 -- Ice Demon -- creates and moves ice nodes
 
-local newnode = fun_caves.clone_node('default:ice')
-newnode.description = "Freezing vapor"
-newnode.tiles = {'fun_caves_wisp.png'}
-newnode.sunlight_propagates = true
-newnode.use_texture_alpha = true
-newnode.walkable = false
-newnode.buildable_to = true
-newnode.pointable = false
-minetest.register_node("fun_caves:freezing_vapor", newnode)
+minetest.register_node("fun_caves:freezing_vapor", {
+	description = "Freezing Vapor",
+	tiles = {'fun_caves_wisp.png'},
+	sunlight_propagates = true,
+	use_texture_alpha = true,
+	drawtype = "glasslike",
+	paramtype = 'light',
+	walkable = false,
+	buildable_to = true,
+	pointable = false,
+})
 
 local function snow_effect(pos, radius)
 	minetest.add_particlespawner({