diff --git a/decor.lua b/decor.lua
index 7433f98..67ee123 100644
--- a/decor.lua
+++ b/decor.lua
@@ -177,7 +177,7 @@ register_decoration(ethereal.fiery, {
 
 -- snowy grass
 
-register_decoration((ethereal.grayness or ethereal.snowy), {
+register_decoration(ethereal.snowy, {
 	place_on = {"ethereal:gray_dirt", "ethereal:cold_dirt",
 			"default:dirt_with_coniferous_litter"},
 	fill_ratio = 0.05,
@@ -302,7 +302,7 @@ register_decoration(ethereal.frost, { -- chance of something edible so high up
 register_decoration(ethereal.snowy, {
 	place_on = {"default:dirt_with_coniferous_litter"},
 	fill_ratio = 0.8,
-	y_min = 20, y_max = 40,
+	y_min = 20, y_max = 140,
 	biomes = {"coniferous_forest"},
 	decoration = "default:snow"})
 
diff --git a/schematics/volcanol.lua b/schematics/volcanol.lua
index efcd73a..84751e9 100644
--- a/schematics/volcanol.lua
+++ b/schematics/volcanol.lua
@@ -2,7 +2,7 @@
 local _ = {name = "air", prob = 0}
 local d = {name = "ethereal:fiery_dirt", prob = 245}
 local s = {name = "default:stone", prob = 255}
-local l = {name = "default:lava_source", prob = 255}
+local l = {name = "default:lava_source", prob = 255, force_place = true}
 local f = {name = "default:lava_flowing", prob = 255}
 local o = {name = "default:obsidian", prob = 215}
 
@@ -13,7 +13,6 @@ ethereal.volcanol = {
 	yslice_prob = {
 		{ypos = 0, prob = 127},
 		{ypos = 1, prob = 127},
-		{ypos = 2, prob = 127}
 	},
 
 	data = {
diff --git a/schematics/volcanom.lua b/schematics/volcanom.lua
index b0a634e..0569080 100644
--- a/schematics/volcanom.lua
+++ b/schematics/volcanom.lua
@@ -1,6 +1,6 @@
 
 local _ = {name = "air", prob = 0}
-local l = {name = "default:lava_source", prob = 225}
+local l = {name = "default:lava_source", prob = 225, force_place = true}
 local s = {name = "default:stone", prob = 255}
 local d = {name = "ethereal:fiery_dirt", prob = 255}
 
diff --git a/schems.lua b/schems.lua
index fa72389..7144610 100644
--- a/schems.lua
+++ b/schems.lua
@@ -148,7 +148,7 @@ register_decoration(ethereal.fiery, {
 
 register_decoration(ethereal.fiery, {
 	place_on = "ethereal:fiery_dirt",
-	fill_ratio = 0.03,
+	fill_ratio = 0.03, place_offset_y = -1,
 	biomes = {"fiery"},
 	schematic = ethereal.basandrabush})
 
@@ -172,19 +172,19 @@ register_decoration(ethereal.grayness, {
 -- default large pine tree for lower elevation
 
 register_decoration(ethereal.snowy, {
-	place_on = "default:dirt_with_coniferous_litter",
+	place_on = {"default:dirt_with_snow", "default:dirt_with_coniferous_litter"},
 	fill_ratio = 0.025,
-	biomes = {"coniferous_forest"},
-	y_min = 10, y_max = 40,
+	biomes = {"coniferous_forest", "taiga"},
+	y_min = 4, y_max = 50,
 	schematic = dpath .. "pine_tree.mts"})
 
 -- small pine for higher elevation
 
 register_decoration(ethereal.snowy, {
-	place_on = {"default:dirt_with_snow"},
+	place_on = {"default:dirt_with_snow", "default:dirt_with_coniferous_litter"},
 	fill_ratio = 0.025,
-	biomes = {"taiga"},
-	y_min = 40, y_max = 140,
+	biomes = {"coniferous_forest", "taiga"},
+	y_min = 50, y_max = 140,
 	schematic = ethereal.pinetree})
 
 -- default apple tree