diff --git a/shader/lighting/texture.frag b/shader/lighting/texture.frag
index 387554cc3..99ebf6421 100644
--- a/shader/lighting/texture.frag
+++ b/shader/lighting/texture.frag
@@ -10,6 +10,7 @@ void main() {
   vec3 pos = texture(screenTexture, vTexPos).xyz;
   vec3 distVec = pos - lightPos.xyz;
   float dist = dot(distVec, distVec);
+//  float dist = dot(distVec.xy, distVec.xy);
 //  if (dist > rad) {
 //    discard;
 //  }
diff --git a/src/Dodge/Data/Config.hs b/src/Dodge/Data/Config.hs
index b4a92c7f3..d8e33ee89 100644
--- a/src/Dodge/Data/Config.hs
+++ b/src/Dodge/Data/Config.hs
@@ -59,7 +59,7 @@ data Config = Config
     , _gr_downsize_res :: ResFactor
     , _gr_world_res :: ResFactor
     , _gr_num_shadow_casters :: NumShadowCasters
-    , _windowX :: Int --size
+    , _windowX :: Int --size in pixels
     , _windowY :: Int
     , _windowPosX :: Int --position in os
     , _windowPosY :: Int
diff --git a/src/Render.hs b/src/Render.hs
index bdedf373a..522525df2 100644
--- a/src/Render.hs
+++ b/src/Render.hs
@@ -162,7 +162,8 @@ renderShadows isclouds cam cfig shadrendertype nWalls nSils nCaps positiontextur
     flip VFSM.mapM_ (VFSM.fromList lightPoints) $ \(V3 x y z, rad, V3 r g b) -> do
         withArray [x,y,z,1,r,g,b,rad] $ glNamedBufferSubData (pdata ^. lightUBO) 0 32
         -- note that the stencil shadows rely on the depth buffer
-        let d = rad * cam ^. camZoom
+        let d = 0.5 * rad * cam ^. camZoom -- rad * cam ^. camZoom
+                -- I don't know how this should be multiplied
             V2 x' y' = worldPosToResOffset cfig cam (V2 x y) 
         -- this is probably too strict, it will be possible for high up lights
         -- to have some of their light cast high up cut off