Roll-down-jumpsuit now works properly with custom items, icon_override and (hopefully) species variants.

code/modules/clothing/clothing.dm

@@ -396,10 +396,28 @@ BLIND     // can't see anything
 	else
 		worn_state = icon_state
 
-	//autodetect rollability
-	if(rolled_down < 0)
-		if((worn_state + "_d_s") in icon_states('icons/mob/uniform.dmi'))
+/obj/item/clothing/under/proc/update_rolldown_status()
+
+	var/mob/living/carbon/human/H
+	if(istype(src.loc, /mob/living/carbon/human))
+		H = src.loc
+
+	var/icon/under_icon
+	if(icon_override)
+		under_icon = icon_override
+	else if(H && sprite_sheets && sprite_sheets[H.species.name])
+		under_icon = sprite_sheets[H.species.name]
+	else if(item_icons && item_icons[slot_w_uniform_str])
+		under_icon = item_icons[slot_w_uniform_str]
+	else
+		under_icon = INV_W_UNIFORM_DEF_ICON
+
+	if((worn_state + "_d_s") in icon_states(under_icon))
+		if(rolled_down != 1)
 			rolled_down = 0
+	else
+		rolled_down = -1
+	if(H) update_clothing_icon()
 
 /obj/item/clothing/under/update_clothing_icon()
 	if (ismob(src.loc))
@@ -542,7 +560,8 @@ BLIND     // can't see anything
 	if(!istype(usr, /mob/living)) return
 	if(usr.stat) return
 
-	if(rolled_down < 0)
+	update_rolldown_status()
+	if(rolled_down == -1)
 		usr << "<span class='notice'>You cannot roll down [src]!</span>"
 		return
 

code/modules/customitems/item_spawning.dm

@@ -61,6 +61,10 @@
 			item.item_state = null
 			item.icon_override = CUSTOM_ITEM_MOB
 
+		var/obj/item/clothing/under/U = item
+		if(istype(U))
+			U.update_rolldown_status()
+
 	// Kits are dumb so this is going to have to be hardcoded/snowflake.
 	if(istype(item, /obj/item/device/kit))
 		var/obj/item/device/kit/K = item