diff --git a/src/Dodge/Data.hs b/src/Dodge/Data.hs
index 696f22091..bca640144 100644
--- a/src/Dodge/Data.hs
+++ b/src/Dodge/Data.hs
@@ -380,17 +380,7 @@ data WorldBeams = WorldBeams
 {- Objects without ids.
 Update themselves, perhaps with side effects.  -}
 data Particle
-    = PtInvShockwave
-        { _ptUpdate     :: World -> Particle -> (World, Maybe Particle)
-        , _ptColor      :: Color
-        , _ptPos        :: Point2
-        , _ptRad        :: Float
-        , _ptDam        :: Int
-        , _ptPush       :: Float
-        , _ptMaxTime    :: Int
-        , _ptTimer      :: Int
-        }
-    | ShockLine 
+    = ShockLine 
         { _ptUpdate :: World -> Particle -> (World, Maybe Particle)
         , _ptPointDirs :: [[(Point2,Float)]]
         , _ptTimer :: Int
diff --git a/src/Dodge/Item/Weapon/ExtraEffect.hs b/src/Dodge/Item/Weapon/ExtraEffect.hs
index 8f7f51b06..0aaae4c3e 100644
--- a/src/Dodge/Item/Weapon/ExtraEffect.hs
+++ b/src/Dodge/Item/Weapon/ExtraEffect.hs
@@ -27,7 +27,6 @@ import Dodge.SoundLogic
 import Dodge.Item.Weapon.LaserPath
 --import Dodge.Item.Attachment.Data
 import Dodge.Creature.Test
-import Dodge.WorldEvent.HelperParticle
 import Picture
 import Geometry.Vector
 import LensHelp
@@ -138,7 +137,7 @@ targetLaserUpdate _ cr w t
         & tgActive .~ False
         )
   where
-    (mp, ps) = reflectLaserAlong 0.2 sp ep w
+    (mp, _) = reflectLaserAlong 0.2 sp ep w
     sp = _crPos cr +.+ 15 *.* unitVectorAtAngle (_crDir cr)
     ep = sp +.+ 5000 *.* normalizeV (mouseWorldPos w -.- sp)
     addLaserPic = lasers .:~ LaserStart
diff --git a/src/Dodge/Particle/Draw.hs b/src/Dodge/Particle/Draw.hs
index 396818773..5594997b5 100644
--- a/src/Dodge/Particle/Draw.hs
+++ b/src/Dodge/Particle/Draw.hs
@@ -1,6 +1,5 @@
 module Dodge.Particle.Draw where
 import Dodge.Data
-import Geometry
 import Picture
 
 drawParticle :: Particle -> Picture
@@ -19,16 +18,16 @@ drawParticle pt = case pt of
 --    rad = r - (3/4) * r * tFraction
 --    tFraction = fromIntegral (_ptTimer pt) / fromIntegral (_ptMaxTime pt)
 
-drawInverseShockwave :: Particle -> Picture
-drawInverseShockwave  pt 
-    = setLayer BloomLayer $ setDepth 20 $ uncurryV translate p 
-                          $ color cyan $ thickCircle rad thickness
-  where
-    p = _ptPos pt
-    r = _ptRad pt
-    t = _ptTimer pt
-    rad = r - 0.1 * r * fromIntegral (10 - t)
-    thickness = fromIntegral (10 - t) **2 * rad / 40
+--drawInverseShockwave :: Particle -> Picture
+--drawInverseShockwave  pt 
+--    = setLayer BloomLayer $ setDepth 20 $ uncurryV translate p 
+--                          $ color cyan $ thickCircle rad thickness
+--  where
+--    p = _ptPos pt
+--    r = _ptRad pt
+--    t = _ptTimer pt
+--    rad = r - 0.1 * r * fromIntegral (10 - t)
+--    thickness = fromIntegral (10 - t) **2 * rad / 40
 
 --drawTeslaArc :: Particle -> Picture
 --drawTeslaArc pt = setLayer BloomNoZWrite $ pictures 
diff --git a/src/Dodge/WorldEvent/Flash.hs b/src/Dodge/WorldEvent/Flash.hs
index dc0e84f71..1da4b377f 100644
--- a/src/Dodge/WorldEvent/Flash.hs
+++ b/src/Dodge/WorldEvent/Flash.hs
@@ -11,7 +11,6 @@ flicker : potentially long, moving, abrupt changes in alpha
 module Dodge.WorldEvent.Flash
     ( explosionFlashAt
     , muzFlareAt
-    , ptFlicker
     , flareCircleAt
     ) where
 import Dodge.Data
@@ -48,9 +47,3 @@ flareCircleAt col alphax tranv = flares .:~ CircFlare
 
 explosionFlashAt :: Point2 -> World -> World
 explosionFlashAt p = tempLightSources .:~ tlsTimeRadFunPos 20 150 (TLSFade 1 10) (addZ 20 p)
-
-ptFlicker :: Particle -> World -> World
-ptFlicker pt 
-    | _ptTimer pt `mod` 7 == 0 = tempLightSources 
-        .:~ tlsTimeRadColPos 1 70 (0.5 *.*.* xyzV4 (_ptColor pt)) (addZ 10 $ _ptPos pt)
-    | otherwise = id
diff --git a/src/Dodge/WorldEvent/Shockwave.hs b/src/Dodge/WorldEvent/Shockwave.hs
index 63a7fbf6f..0efcc91d0 100644
--- a/src/Dodge/WorldEvent/Shockwave.hs
+++ b/src/Dodge/WorldEvent/Shockwave.hs
@@ -2,16 +2,11 @@ module Dodge.WorldEvent.Shockwave
     ( makeShockwaveAt
     , inverseShockwaveAt
     ) where
-import Dodge.Zoning.Wall
 import Dodge.Data
-import Dodge.Wall.Damage
-import Dodge.Base
 import Geometry
 import Picture
 import LensHelp
 
-import Data.Foldable
-import qualified IntMapHelp as IM
 -- currently very effective against walls
 makeShockwaveAt 
     :: [Int]    -- ^ IDs of invulnerable creatures.
diff --git a/src/Dodge/WorldEvent/SpawnParticle.hs b/src/Dodge/WorldEvent/SpawnParticle.hs
index 0a78dff15..8efe6f34f 100644
--- a/src/Dodge/WorldEvent/SpawnParticle.hs
+++ b/src/Dodge/WorldEvent/SpawnParticle.hs
@@ -6,7 +6,6 @@ module Dodge.WorldEvent.SpawnParticle
     , randParticleAt
     ) where
 import Dodge.Data
-import Dodge.WorldEvent.Shockwave
 import RandomHelp
 import Picture
 import Geometry