POLARIS: Planes shenanigans. Begins 'plane' work.

code/_helpers/icons.dm

@@ -873,3 +873,9 @@ proc/sort_atoms_by_layer(var/list/atoms)
 				result.Swap(i, gap + i)
 				swapped = 1
 	return result
+
+/proc/gen_hud_image(var/file, var/person, var/state, var/plane)
+	var/image/img = image(file, person, state)
+	img.plane = plane //Thanks Byond.
+	img.appearance_flags = APPEARANCE_UI|KEEP_APART
+	return img

code/_helpers/mobs.dm

@@ -129,7 +129,7 @@ proc/age2agedescription(age)
 		else				return "unknown"
 
 /proc/RoundHealth(health)
-	var/list/icon_states = icon_states('icons/mob/hud_med.dmi')
+	var/list/icon_states = icon_states(ingame_hud_med)
 	for(var/icon_state in icon_states)
 		if(health >= text2num(icon_state))
 			return icon_state