diff --git a/doomsday/plugins/doom64/defs/materials.ded b/doomsday/plugins/doom64/defs/materials.ded
index 8ced8e7190..3b7614388a 100644
--- a/doomsday/plugins/doom64/defs/materials.ded
+++ b/doomsday/plugins/doom64/defs/materials.ded
@@ -70,9 +70,17 @@ Material Mods "textures:CYTRAKA" {
 }
 
 Material Mods "textures:SEXIT" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+  }
 }
 
 Material Mods "textures:SEXITA" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+  }
 }
diff --git a/doomsday/plugins/heretic/defs/heretic/materials.ded b/doomsday/plugins/heretic/defs/heretic/materials.ded
index b16b1cc27c..5c66d78487 100644
--- a/doomsday/plugins/heretic/defs/heretic/materials.ded
+++ b/doomsday/plugins/heretic/defs/heretic/materials.ded
@@ -16,19 +16,43 @@ SkipIf -nodefaultfx;
 #
 
 Material Mods "flats:FLATHUH1" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
 
 Material Mods "flats:FLATHUH2" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
 
 Material Mods "flats:FLATHUH3" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
 
 Material Mods "flats:FLATHUH4" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
 
 #
@@ -36,13 +60,28 @@ Material Mods "flats:FLATHUH4" {
 #
 
 Material Mods "textures:LAVAFL1" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
 
 Material Mods "textures:LAVAFL2" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
 
 Material Mods "textures:LAVAFL3" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
diff --git a/doomsday/plugins/hexen/defs/hexen/materials.ded b/doomsday/plugins/hexen/defs/hexen/materials.ded
index 4dbd1fa2de..ec5092e223 100644
--- a/doomsday/plugins/hexen/defs/hexen/materials.ded
+++ b/doomsday/plugins/hexen/defs/hexen/materials.ded
@@ -16,7 +16,13 @@ SkipIf -nodefaultfx;
 #
 
 Material Mods "flats:X_001" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
 
 Material Mods "flats:X_002" {
@@ -36,7 +42,13 @@ Material Mods "flats:X_004" {
 #
 
 Material Mods "textures:X_FIRE01" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+    Stage { Glow = 1.8; Glow Rnd = .8; }
+  }
 }
 
 Material Mods "textures:X_FIRE02" {
@@ -52,7 +64,21 @@ Material Mods "textures:X_FIRE04" {
 }
 
 Material Mods "textures:X_FAC01" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+  }
 }
 
 Material Mods "textures:X_FAC02" {
@@ -100,7 +126,18 @@ Material Mods "textures:X_FAC12" {
 }
 
 Material Mods "textures:TPORT1" {
-  Layer { Stage { Glow = 1.8; } }
+  Layer
+  {
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+    Stage { Glow = 1.8; }
+  }
 }
 
 Material Mods "textures:TPORT2" {