lava particles are here.

abms.lua

@@ -145,3 +145,14 @@ minetest.register_abm({ --embers for fire
 		end
 	end
 })
+
+minetest.register_abm({ --lava
+	nodenames = {'default:lava_source', 'default:lava_flowing'},
+	interval = 3,
+	chance = 7,
+	action = function(pos, node)
+		if minetest.get_node({x=pos.x, y=pos.y+1.0, z=pos.z}).name == 'air' then
+			lava_particles(pos)
+		end
+	end
+})

changelog.txt

@@ -1,3 +1,6 @@
+6-3-15:
+Campfires and embers now have particles, smoke for the embers, and little sparks for the fires. Also lava now spawns little lava particles, the particles do nothing other than add a little visual effect.
+
 5-30-15:
 Napiophelios put together some nice smoke bombs and molotov cocktails for this mod, I(Nathan) did a few tweaks, changed some alignment and took care of some depreciated functions to stop debug spamming.
 

functions.lua

@@ -83,3 +83,24 @@ function ember_particles(pos)
 --      playername = 'singleplayer',
     })
 end
+
+function lava_particles(pos)
+	minetest.add_particlespawner({
+        amount = 2,
+        time = 1,
+        minpos = {x=pos.x, y=pos.y, z=pos.z},
+        maxpos = {x=pos.x, y=pos.y, z=pos.z},
+        minvel = {x=-.4, y=.2, z=-.4},
+        maxvel = {x=.6,  y=1,  z=.6},
+        minacc = {x=-.3, y=.2, z=-.3},
+        maxacc = {x=.3, y=.6, z=.3},
+        minexptime = 1,
+        maxexptime = 2,
+        minsize = .4,
+        maxsize = 2,
+        collisiondetection = false,
+        texture = 'default_lava.png',
+        vertical = false,
+--      playername = 'singleplayer',
+    })
+end