diff --git a/inc/thorvg.h b/inc/thorvg.h
index ab69d62b..32145249 100644
--- a/inc/thorvg.h
+++ b/inc/thorvg.h
@@ -165,7 +165,9 @@ enum class CompositeMethod : uint8_t
     AddMask,            ///< Combines the target and source objects pixels using target alpha. (T * TA) + (S * (255 - TA)) (Experimental API)
     SubtractMask,       ///< Subtracts the source color from the target color while considering their respective target alpha. (T * TA) - (S * (255 - TA)) (Experimental API)
     IntersectMask,      ///< Computes the result by taking the minimum value between the target alpha and the source alpha and multiplies it with the target color. (T * min(TA, SA)) (Experimental API)
-    DifferenceMask      ///< Calculates the absolute difference between the target color and the source color multiplied by the complement of the target alpha. abs(T - S * (255 - TA)) (Experimental API)
+    DifferenceMask,     ///< Calculates the absolute difference between the target color and the source color multiplied by the complement of the target alpha. abs(T - S * (255 - TA)) (Experimental API)
+    LightenMask,        ///< Where multiple masks intersect, the highest transparency value is used. (Experimental API)
+    DarkenMask          ///< Where multiple masks intersect, the lowest transparency value is used. (Experimental API)
 };
 
 
diff --git a/src/loaders/lottie/tvgLottieParser.cpp b/src/loaders/lottie/tvgLottieParser.cpp
index f12cd5c6..525405a0 100644
--- a/src/loaders/lottie/tvgLottieParser.cpp
+++ b/src/loaders/lottie/tvgLottieParser.cpp
@@ -71,14 +71,8 @@ CompositeMethod LottieParser::getMaskMethod(bool inversed)
         case 's': return CompositeMethod::SubtractMask;
         case 'i': return CompositeMethod::IntersectMask;
         case 'f': return CompositeMethod::DifferenceMask;
-        case 'l': {
-            TVGLOG("LOTTIE", "Mask Lighten is not supported");
-            return CompositeMethod::None;
-        }
-        case 'd': {
-            TVGLOG("LOTTIE", "Mask Darken is not supported");
-            return CompositeMethod::None;
-        }
+        case 'l': return CompositeMethod::LightenMask;
+        case 'd': return CompositeMethod::DarkenMask;
         default: return CompositeMethod::None;
     }
 }
diff --git a/src/renderer/sw_engine/tvgSwRaster.cpp b/src/renderer/sw_engine/tvgSwRaster.cpp
index e8eaaf7a..5c82b12a 100644
--- a/src/renderer/sw_engine/tvgSwRaster.cpp
+++ b/src/renderer/sw_engine/tvgSwRaster.cpp
@@ -194,10 +194,21 @@ static inline uint8_t _opMaskDifference(uint8_t s, uint8_t d, uint8_t a)
 }
 
 
+static inline uint8_t _opMaskLighten(uint8_t s, uint8_t d, uint8_t a)
+{
+    return (s > d) ? s : d;
+}
+
+
+static inline uint8_t _opMaskDarken(uint8_t s, uint8_t d, uint8_t a)
+{
+    return (s < d) ? s : d;
+}
+
+
 static inline bool _direct(CompositeMethod method)
 {
-    //subtract & Intersect allows the direct composition
-    if (method == CompositeMethod::SubtractMask || method == CompositeMethod::IntersectMask) return true;
+    if (method == CompositeMethod::SubtractMask || method == CompositeMethod::IntersectMask || method == CompositeMethod::DarkenMask) return true;
     return false;
 }
 
@@ -209,6 +220,8 @@ static inline SwMask _getMaskOp(CompositeMethod method)
         case CompositeMethod::SubtractMask: return _opMaskSubtract;
         case CompositeMethod::DifferenceMask: return _opMaskDifference;
         case CompositeMethod::IntersectMask: return _opMaskIntersect;
+        case CompositeMethod::LightenMask: return _opMaskLighten;
+        case CompositeMethod::DarkenMask: return _opMaskDarken;
         default: return nullptr;
     }
 }
diff --git a/src/renderer/tvgRender.h b/src/renderer/tvgRender.h
index a78c6595..75733fba 100644
--- a/src/renderer/tvgRender.h
+++ b/src/renderer/tvgRender.h
@@ -321,6 +321,8 @@ static inline bool MASK_REGION_MERGING(CompositeMethod method)
         //these might expand the rendering region
         case CompositeMethod::AddMask:
         case CompositeMethod::DifferenceMask:
+        case CompositeMethod::LightenMask:
+        case CompositeMethod::DarkenMask:
             return true;
         default:
             TVGERR("RENDERER", "Unsupported Composite Method! = %d", (int)method);
@@ -354,6 +356,8 @@ static inline ColorSpace COMPOSITE_TO_COLORSPACE(RenderMethod* renderer, Composi
         case CompositeMethod::DifferenceMask:
         case CompositeMethod::SubtractMask:
         case CompositeMethod::IntersectMask:
+        case CompositeMethod::LightenMask:
+        case CompositeMethod::DarkenMask:
             return ColorSpace::Grayscale8;
         //TODO: Optimize Luma/InvLuma colorspace to Grayscale8
         case CompositeMethod::LumaMask: