funny synth port part 1 which may or may not have broken a lot

code/modules/mob/dead/new_player/preferences_setup.dm

@@ -21,7 +21,7 @@
 	if(!pref_species)
 		var/rando_race = pick(GLOB.roundstart_races)
 		pref_species = new rando_race()
-	features = random_features()
+	features = random_features(pref_species?.id)
 	age = rand(AGE_MIN,AGE_MAX)
 
 /datum/preferences/proc/update_preview_icon()

code/modules/mob/dead/new_player/sprite_accessories/_sprite_accessories.dm

@@ -61,6 +61,9 @@
 	var/dimension_y = 32
 	var/center = FALSE	//Should we center the sprite?
 
+	//For soft-restricting markings to species IDs
+	var/list/recommended_species
+
 /datum/sprite_accessory/underwear
 	icon = 'icons/mob/underwear.dmi'
-	var/has_color = FALSE
+	var/has_color = FALSE

code/modules/mob/dead/new_player/sprite_accessories/tails.dm

@@ -433,10 +433,12 @@
 /datum/sprite_accessory/mam_tails
 	color_src = MATRIXED
 	icon = 'modular_citadel/icons/mob/mam_tails.dmi'
+	recommended_species = list("mammal", "slimeperson", "podweak", "felinid", "insect")
 
 /datum/sprite_accessory/mam_tails/none
 	name = "None"
 	icon_state = "none"
+	recommended_species = null
 
 /datum/sprite_accessory/mam_tails_animated
 	color_src = MATRIXED
@@ -707,4 +709,4 @@ datum/sprite_accessory/mam_tails/insect
 
 /datum/sprite_accessory/mam_tails_animated/wolf
 	name = "Wolf"
-	icon_state = "wolf"
+	icon_state = "wolf"

code/modules/mob/living/carbon/human/species.dm

@@ -82,6 +82,7 @@ GLOBAL_LIST_EMPTY(roundstart_races)
 	var/whitelisted = 0 		//Is this species restricted to certain players?
 	var/whitelist = list() 		//List the ckeys that can use this species, if it's whitelisted.: list("John Doe", "poopface666", "SeeALiggerPullTheTrigger") Spaces & capitalization can be included or ignored entirely for each key as it checks for both.
 
+	var/icon_limbs //Overrides the icon used for the limbs of this species. Mainly for downstream, and also because hardcoded icons disgust me. Implemented and maintained as a favor in return for a downstream's implementation of synths.
 
 ///////////
 // PROCS //