diff --git a/src/gui/game/GameView.cpp b/src/gui/game/GameView.cpp
index 01ba39c04..9d4295cb2 100644
--- a/src/gui/game/GameView.cpp
+++ b/src/gui/game/GameView.cpp
@@ -2071,8 +2071,8 @@ void GameView::OnDraw()
 				else if (sample.particle.type == PT_FILT)
 				{
 					sampleInfo << c->ElementResolve(sample.particle.type, sample.particle.ctype);
-					const char* filtModes[] = {"set colour", "AND", "OR", "subtract colour", "red shift", "blue shift", "no effect"};
-					if (sample.particle.tmp>=0 && sample.particle.tmp<=6)
+					const char* filtModes[] = {"set colour", "AND", "OR", "subtract colour", "red shift", "blue shift", "no effect", "XOR", "NOT"};
+					if (sample.particle.tmp>=0 && sample.particle.tmp<=8)
 						sampleInfo << " (" << filtModes[sample.particle.tmp] << ")";
 					else
 						sampleInfo << " (unknown mode)";
diff --git a/src/simulation/elements/FILT.cpp b/src/simulation/elements/FILT.cpp
index 62c3afcfc..9c7615f8a 100644
--- a/src/simulation/elements/FILT.cpp
+++ b/src/simulation/elements/FILT.cpp
@@ -100,6 +100,10 @@ int Element_FILT::interactWavelengths(Particle* cpart, int origWl)
 			}
 		case 6:
 			return origWl; // No change
+		case 7:
+			return origWl ^ filtWl; // XOR colours
+		case 8:
+			return (~origWl) & mask; // Invert colours
 		default:
 			return filtWl;
 	}