Made it possible via moretrees config to force all moretrees, default, and

default jungle tree leaves to be plantlike drawtype.

The default setting is now plantlike.  Change moretres_settings.txt in
your world folder if you don't like it.

Rearranged a bit of code to accommodate this.

default_settings.txt

@@ -26,6 +26,12 @@ moretrees.spawn_saplings		= true
 
 moretrees.enable_stairsplus		= true
 
+-- Set this to false if you don't like the plantlike drawtype for leaves
+-- (this is done to improve peoples' framerates without resorting to making 
+-- leaf nodes opaque).  Affects default leaves and default jungle leaves also.
+
+moretrees.plantlike_leaves		= true
+
 -- Set this to true to enable leaf decay of all trees except the default ones.
 
 moretrees.enable_leafdecay		= true

init.lua

@@ -39,7 +39,7 @@ if io.open(worldpath.."/moretrees_settings.txt","r") == nil then
 		end
 		io.write(block)
 	end
-
+	io.close()
 else
 	dofile(worldpath.."/moretrees_settings.txt")
 end
@@ -63,6 +63,17 @@ else
 	moretrees.expect_infinite_stacks = true
 end
 
+-- node clone, for redefining stuff
+
+function moretrees:clone_node(name)
+	node2={}
+	node=minetest.registered_nodes[name]
+	for k,v in pairs(node) do
+		node2[k]=v
+	end
+	return node2
+end
+
 -- tables, load other files
 
 moretrees.cutting_tools = {

leafdecay.lua

@@ -1,14 +1,5 @@
 -- leaf decay
 
-function clone_node(name)
-	node2={}
-	node=minetest.registered_nodes[name]
-	for k,v in pairs(node) do
-		node2[k]=v
-	end
-	return node2
-end
-
 -- this function is based on the default leafdecay code
 local process_drops = function(pos, name)
 	local drops = minetest.get_node_drops(name)
@@ -85,10 +76,6 @@ end
 
 if moretrees.enable_default_leafdecay then
 
-	new_default_leaves = clone_node("default:leaves")
-	new_default_leaves.groups = {snappy=3, flammable=2, leaves=1}
-	minetest.register_node(":default:leaves", new_default_leaves)
-
 	minetest.register_abm({
 		nodenames = "default:leaves",
 		interval = moretrees.default_leafdecay_delay,
@@ -105,10 +92,6 @@ end
 
 if moretrees.enable_default_jungle_leafdecay then
 
-	new_default_jungle_leaves = clone_node("default:jungleleaves")
-	new_default_jungle_leaves.groups = {snappy=3, flammable=2, leaves=1}
-	minetest.register_node(":default:jungleleaves", new_default_jungle_leaves)
-
 	minetest.register_abm({
 		nodenames = "default:jungleleaves",
 		interval = moretrees.default_jungle_leafdecay_delay,

node_defs.lua

@@ -19,6 +19,35 @@ local dirs1 = { 21, 20, 23, 22, 21 }
 local dirs2 = { 12, 9, 18, 7, 12 }
 local dirs3 = { 14, 11, 16, 5, 14 }
 
+moretrees_new_leaves_drawtype = "allfaces_optional"
+moretrees_new_leaves_visual_scale = 1.0
+moretrees_new_leaves_extension = ".png"
+
+if moretrees.plantlike_leaves then
+	moretrees_new_leaves_drawtype = "plantlike"
+	moretrees_new_leaves_visual_scale = 1.189
+	moretrees_new_leaves_extension = "_plantlike.png"
+end
+
+new_default_leaves = moretrees:clone_node("default:leaves")
+	if moretrees.enable_default_leafdecay then
+		new_default_leaves.groups = {snappy=3, flammable=2, leaves=1}
+	end
+	new_default_leaves.drawtype = moretrees_new_leaves_drawtype
+	new_default_leaves.visual_scale = moretrees_new_leaves_visual_scale
+	new_default_leaves.tiles = {"default_leaves"..moretrees_new_leaves_extension}
+	minetest.register_node(":default:leaves", new_default_leaves)
+
+new_default_jungle_leaves = clone_node("default:jungleleaves")
+	if moretrees.enable_default_jungle_leafdecay then
+	new_default_jungle_leaves.groups = {snappy=3, flammable=2, leaves=1}
+	end
+	new_default_jungle_leaves = moretrees:clone_node("default:jungleleaves")
+	new_default_jungle_leaves.drawtype = moretrees_new_leaves_drawtype
+	new_default_jungle_leaves.visual_scale = moretrees_new_leaves_visual_scale
+	new_default_jungle_leaves.tiles = {"default_jungleleaves"..moretrees_new_leaves_extension}
+	minetest.register_node(":default:jungleleaves", new_default_jungle_leaves)
+
 for i in ipairs(moretrees.treelist) do
 	local treename = moretrees.treelist[i][1]
 	local treedesc = moretrees.treelist[i][2]
@@ -103,8 +132,9 @@ for i in ipairs(moretrees.treelist) do
 
 		minetest.register_node("moretrees:"..treename.."_leaves", {
 			description = treedesc.." Leaves",
-			drawtype = "allfaces_optional",
-			tiles = { "moretrees_"..treename.."_leaves.png" },
+			drawtype = moretrees_new_leaves_drawtype,
+			visual_scale = moretrees_new_leaves_visual_scale,
+			tiles = { "moretrees_"..treename.."_leaves"..moretrees_new_leaves_extension },
 			paramtype = "light",
 			groups = {snappy=3, flammable=2, leaves=1, moretrees_leaves=1},
 			sounds = default.node_sound_leaves_defaults(),
@@ -308,8 +338,9 @@ for color = 1, 3 do
 	local leave_name = "moretrees:jungletree_leaves_"..jungleleaves[color]
 	minetest.register_node(leave_name, {
 		description = "Jungle Tree Leaves ("..jungleleavesnames[color]..")",
-		drawtype = "allfaces_optional",
-		tiles = {"moretrees_jungletree_leaves_"..jungleleaves[color]..".png"},
+		drawtype = moretrees_new_leaves_drawtype,
+		visual_scale = moretrees_new_leaves_visual_scale,
+		tiles = {"moretrees_jungletree_leaves_"..jungleleaves[color]..moretrees_new_leaves_extension},
 		paramtype = "light",
 		groups = {snappy=3, flammable=2, leaves=1, moretrees_leaves=1},
 		drop = {
@@ -326,9 +357,10 @@ end
 -- Extra needles for firs
 
 minetest.register_node("moretrees:fir_leaves_bright", {
-	drawtype = "allfaces_optional",
+	drawtype = moretrees_new_leaves_drawtype,
+	visual_scale = moretrees_new_leaves_visual_scale,
 	description = "Douglas Fir Leaves (Bright)",
-	tile_images = { "moretrees_fir_leaves_bright.png" },
+	tile_images = { "moretrees_fir_leaves_bright"..moretrees_new_leaves_extension },
 	paramtype = "light",
 
 	groups = {snappy=3, flammable=2, leaves=1, moretrees_leaves=1 },