diff --git a/Source/Plugins/BuilderModes/VisualModes/Effect3DFloor.cs b/Source/Plugins/BuilderModes/VisualModes/Effect3DFloor.cs
index 9e2a93a3..cbf6e10a 100644
--- a/Source/Plugins/BuilderModes/VisualModes/Effect3DFloor.cs
+++ b/Source/Plugins/BuilderModes/VisualModes/Effect3DFloor.cs
@@ -144,6 +144,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 					ignorebottomheight = linedef.Args[1] == 1;
 					break;
 				case "srb2_fofintangibleinvisible":
+				case "srb2_foffog":
 					alpha = 0;
 					break;
 				case "srb2_fofintangible":