diff --git a/package.yaml b/package.yaml
index 5994a021b..aeb0ca773 100644
--- a/package.yaml
+++ b/package.yaml
@@ -48,6 +48,7 @@ dependencies:
 - directory
 - QuickCheck
 - extra
+  #- streaming
 
 library:
   source-dirs: src
diff --git a/src/Geometry/Data.hs b/src/Geometry/Data.hs
index 7e03194f4..a657021a6 100644
--- a/src/Geometry/Data.hs
+++ b/src/Geometry/Data.hs
@@ -32,6 +32,7 @@ fromV3 :: V3 a -> (a,a,a)
 fromV3 (V3 a b c) = (a,b,c)
 
 uncurryV :: (a -> a -> b) -> V2 a -> b
+{-# INLINE uncurryV #-}
 uncurryV f (V2 x y) = f x y
 
 fstV2 :: V2 a -> a
diff --git a/src/Render.hs b/src/Render.hs
index 78233e04c..9ee638e78 100644
--- a/src/Render.hs
+++ b/src/Render.hs
@@ -171,7 +171,7 @@ pokeBindFoldableLayer
 pokeBindFoldableLayer pdata m = do
     let shads = _pictureShaders pdata
 
-    slist'' <- pokeLayVerxsPart (fmap (_vaoVBO . _vshaderVAO) shads) m (pure $ pure 0)
+    slist'' <- pokeLayVerxsFold (fmap (_vaoVBO . _vshaderVAO) shads) m
     bindShaderLay shads slist''
 
     return slist''
diff --git a/src/Shader/Poke.hs b/src/Shader/Poke.hs
index f7b7c6680..d4346ad09 100644
--- a/src/Shader/Poke.hs
+++ b/src/Shader/Poke.hs
@@ -7,6 +7,7 @@ module Shader.Poke
     , pokePoint33s
     , pokeVerxs
     , pokeLayVerxs
+    , pokeLayVerxsFold
     , pokeLayVerxsPart
     , pokeLayVerxsPartM
     , pokeLayVerxsM
@@ -18,19 +19,24 @@ import Picture.Data
 import Geometry.Data
 import Layers
 
+--import qualified Streaming.Prelude as SP
 --import Data.Maybe
 --import Data.List
 import Foreign
 import Control.Monad
---import qualified Control.Foldl as F
+import qualified Control.Foldl as F
 --import qualified Data.IntMap.Strict as IM
 --import Control.Lens
 
 pokeVerxs :: PicShads VBO -> [Verx] -> IO (PicShads Int)
-pokeVerxs vbos vxs0 = go vxs0 (pure 0)
-  where
-    go [] !count = return count
-    go (!vx:vxs) !count = pokeVerx vbos count vx >> (go vxs $! addCountVerx count vx)
+pokeVerxs vbos = F.foldM $ F.FoldM 
+    (\count vx -> pokeVerx vbos count vx >> return (addCountVerx count vx))
+    (pure $ pure 0)
+    return
+--pokeVerxs vbos vxs0 = go vxs0 (pure 0)
+--  where
+--    go [] !count = return count
+--    go (!vx:vxs) !count = pokeVerx vbos count vx >> (go vxs $! addCountVerx count vx)
 
 -- this is very brittle, but want to optimise speed if possible here
 pokeVerx :: PicShads VBO -> PicShads Int -> Verx -> IO ()
@@ -121,6 +127,12 @@ pokePoint3s ptr vals0 = go vals0 0
       where
         off i = n*3 + i
 
+pokeLayVerxsFold :: PicShads VBO -> [Verx] -> IO (Layers (PicShads Int))
+pokeLayVerxsFold !vbos = F.foldM $ F.FoldM
+    (\counts vx -> pokeLayVerx vbos counts vx >> return (addLayCountVerx counts vx))
+    (pure $ pure $ pure 0)
+    return
+
 pokeLayVerxsM :: PicShads VBO -> [Verx] -> IO (Layers (PicShads Int))
 pokeLayVerxsM !vbos = foldM f (pure $ pure 0)
   where
@@ -145,7 +157,7 @@ pokeLayVerxs !vbos vxs0 = go vxs0 (pure (pure 0))
 
 -- this is very brittle, but want to optimise speed if possible here
 pokeLayVerx :: PicShads VBO -> Layers (PicShads Int) -> Verx -> IO ()
-{-# INLINE pokeLayVerx #-}
+--{-# INLINE pokeLayVerx #-}
 pokeLayVerx vbos imoffsets Verx{_vxPos=thePos,_vxCol=theCol,_vxType=theType, _vxLayer = theLay} = case theType of
     PolyV -> poke34 (plusPtr (_vboPtr $ _psPoly vbos) ((_psPoly offsets + layOff) * 7 * floatSize)) thePos theCol
     PolyzV x        -> poke34 thePtr thePos theCol