The great rock update.

code/modules/mining/mine_outcrops.dm

@@ -0,0 +1,117 @@
+/obj/structure/outcrop
+	name = "outcrop"
+	desc = "A boring rocky outcrop."
+	icon = 'icons/obj/outcrop.dmi'
+	density = 1
+	throwpass = 1
+	climbable = 1
+	anchored = 1
+	icon_state = "outcrop"
+	var/mindrop = 5
+	var/upperdrop = 10
+	var/outcropdrop = /obj/item/weapon/ore/glass
+
+/obj/structure/outcrop/Initialize()
+	. = ..()
+	if(prob(1))
+		overlays += image(icon, "[initial(icon_state)]-egg")
+
+/obj/structure/outcrop/diamond
+	name = "shiny outcrop"
+	desc = "A shiny rocky outcrop."
+	icon_state = "outcrop-diamond"
+	mindrop = 2
+	upperdrop = 4
+	outcropdrop = /obj/item/weapon/ore/diamond
+
+/obj/structure/outcrop/phoron
+	name = "shiny outcrop"
+	desc = "A shiny rocky outcrop."
+	icon_state = "outcrop-phoron"
+	mindrop = 4
+	upperdrop = 8
+	outcropdrop = /obj/item/weapon/ore/phoron
+
+/obj/structure/outcrop/iron
+	name = "rugged outcrop"
+	desc = "A rugged rocky outcrop."
+	icon_state = "outcrop-iron"
+	mindrop = 10
+	upperdrop = 20
+	outcropdrop = /obj/item/weapon/ore/iron
+
+/obj/structure/outcrop/coal
+	name = "rugged outcrop"
+	desc = "A rugged rocky outcrop."
+	icon_state = "outcrop-coal"
+	mindrop = 10
+	upperdrop = 20
+	outcropdrop = /obj/item/weapon/ore/coal
+
+/obj/structure/outcrop/lead
+	name = "rugged outcrop"
+	desc = "A rugged rocky outcrop."
+	icon_state = "outcrop-lead"
+	mindrop = 2
+	upperdrop = 5
+	outcropdrop = /obj/item/weapon/ore/lead
+
+/obj/structure/outcrop/gold
+	name = "hollow outcrop"
+	desc = "A hollow rocky outcrop."
+	icon_state = "outcrop-gold"
+	mindrop = 4
+	upperdrop = 6
+	outcropdrop = /obj/item/weapon/ore/gold
+
+/obj/structure/outcrop/silver
+	name = "hollow outcrop"
+	desc = "A hollow rocky outcrop."
+	icon_state = "outcrop-silver"
+	mindrop = 6
+	upperdrop = 8
+	outcropdrop = /obj/item/weapon/ore/silver
+
+/obj/structure/outcrop/platinum
+	name = "hollow outcrop"
+	desc = "A hollow rocky outcrop."
+	icon_state = "outcrop-platinum"
+	mindrop = 2
+	upperdrop = 5
+	outcropdrop = /obj/item/weapon/ore/osmium
+
+/obj/structure/outcrop/uranium
+	name = "spiky outcrop"
+	desc = "A spiky rocky outcrop, it glows faintly."
+	icon_state = "outcrop-uranium"
+	mindrop = 4
+	upperdrop = 8
+	outcropdrop = /obj/item/weapon/ore/uranium
+
+/obj/structure/outcrop/attackby(obj/item/W as obj, mob/user as mob)
+	if (istype(W, /obj/item/weapon/pickaxe))
+		to_chat(user, "<span class='notice'>[user] begins to hack away at \the [src].</span>")
+		if(do_after(user,40))
+			to_chat(user, "<span class='notice'>You have finished digging!</span>")
+			for(var/i=0;i<(rand(mindrop,upperdrop));i++)
+				new outcropdrop(get_turf(src))
+			qdel(src)
+			return
+
+/obj/random/outcrop //In case you want an outcrop without pre-determining the type of ore.
+	name = "random rock outcrop"
+	desc = "This is a random rock outcrop."
+	icon = 'icons/obj/outcrop.dmi'
+	icon_state = "outcrop-random"
+
+/obj/random/outcrop/item_to_spawn()
+	return pick(prob(100);/obj/structure/outcrop,
+				prob(100);/obj/structure/outcrop/iron,
+				prob(100);/obj/structure/outcrop/coal,
+				prob(65);/obj/structure/outcrop/silver,
+				prob(50);/obj/structure/outcrop/gold,
+				prob(30);/obj/structure/outcrop/uranium,
+				prob(30);/obj/structure/outcrop/phoron,
+				prob(7);/obj/structure/outcrop/diamond,
+				prob(15);/obj/structure/outcrop/platinum,
+				prob(15);/obj/structure/outcrop/lead)

code/modules/mining/mine_turfs.dm

@@ -11,6 +11,10 @@ var/list/mining_overlay_cache = list()
 	name = "rock"
 	icon = 'icons/turf/walls.dmi'
 	icon_state = "rock"
+	var/rock_side_icon_state = "rock_side"
+	var/sand_icon_state = "asteroid"
+	var/rock_icon_state = "rock"
+	var/random_icon = 0
 	oxygen = 0
 	nitrogen = 0
 	opacity = 1
@@ -54,6 +58,14 @@ var/list/mining_overlay_cache = list()
 
 	has_resources = 1
 
+// Alternative rock wall sprites.
+/turf/simulated/mineral/light
+	icon_state = "rock-light"
+	rock_side_icon_state = "rock_side-light"
+	sand_icon_state = "sand-light"
+	rock_icon_state = "rock-light"
+	random_icon = 1
+
 /turf/simulated/mineral/ignore_mapgen
 	ignore_mapgen = 1
 
@@ -66,6 +78,23 @@ var/list/mining_overlay_cache = list()
 	blocks_air = 0
 	can_build_into_floor = TRUE
 
+//Alternative sand floor sprite.
+turf/simulated/mineral/floor/light
+	icon_state = "sand-light"
+	sand_icon_state = "sand-light"
+
+turf/simulated/mineral/floor/light_border
+	icon_state = "sand-light-border"
+	sand_icon_state = "sand-light-border"
+
+turf/simulated/mineral/floor/light_nub
+	icon_state = "sand-light-nub"
+	sand_icon_state = "sand-light-nub"
+
+turf/simulated/mineral/floor/light_corner
+	icon_state = "sand-light-corner"
+	sand_icon_state = "sand-light-corner"
+
 /turf/simulated/mineral/floor/ignore_mapgen
 	ignore_mapgen = 1
 
@@ -130,6 +159,9 @@ var/list/mining_overlay_cache = list()
 	update_icon(1)
 	if(density && mineral)
 		. = INITIALIZE_HINT_LATELOAD
+	if(random_icon)
+		dir = pick(alldirs)
+		. = INITIALIZE_HINT_LATELOAD
 
 /turf/simulated/mineral/LateInitialize()
 	if(density && mineral)
@@ -147,13 +179,13 @@ var/list/mining_overlay_cache = list()
 			name = "rock"
 
 		icon = 'icons/turf/walls.dmi'
-		icon_state = "rock"
+		icon_state = rock_icon_state
 
 		//Apply overlays if we should have borders
 		for(var/direction in cardinal)
 			var/turf/T = get_step(src,direction)
 			if(istype(T) && !T.density)
-				add_overlay(get_cached_border("rock_side",direction,icon,"rock_side"))
+				add_overlay(get_cached_border(rock_side_icon_state,direction,icon,rock_side_icon_state))
 
 			if(archaeo_overlay)
 				add_overlay(archaeo_overlay)
@@ -165,7 +197,7 @@ var/list/mining_overlay_cache = list()
 	else
 		name = "sand"
 		icon = 'icons/turf/flooring/asteroid.dmi'
-		icon_state = "asteroid"
+		icon_state = sand_icon_state
 
 		if(sand_dug)
 			add_overlay("dug_overlay")
@@ -179,7 +211,7 @@ var/list/mining_overlay_cache = list()
 			else
 				var/turf/T = get_step(src, direction)
 				if(istype(T) && T.density)
-					add_overlay(get_cached_border("rock_side",direction,'icons/turf/walls.dmi',"rock_side"))
+					add_overlay(get_cached_border(rock_side_icon_state,direction,'icons/turf/walls.dmi',rock_side_icon_state))
 
 		if(overlay_detail)
 			add_overlay('icons/turf/flooring/decals.dmi',overlay_detail)