diff --git a/shader/toneshader.cpp b/shader/toneshader.cpp
index 2d41223..d616eda 100644
--- a/shader/toneshader.cpp
+++ b/shader/toneshader.cpp
@@ -121,20 +121,22 @@ Color ToneShader::shade(const Scene &scene, const Ray &ray) const
     {
         float transition =
                 (brightness - MIDTONE_HIGHLIGHT_THRESHOLD) / (HIGHLIGHT_THRESHOLD - MIDTONE_HIGHLIGHT_THRESHOLD);
-        if (randomDistribution(dev) < transition)
-            tone = highlightColor;
-        else
-            tone = midtoneColor;
+        tone = highlightColor * transition + midtoneColor * (1 - transition);
+//        if (randomDistribution(dev) < transition)
+//            tone = highlightColor;
+//        else
+//            tone = midtoneColor;
     } else if (brightness > MIDTONE_THRESHOLD)
     {
         tone = midtoneColor;
     } else if (brightness > SHADOW_MIDTONE_THRESHOLD)
     {
         float transition = (brightness - SHADOW_MIDTONE_THRESHOLD) / (MIDTONE_THRESHOLD - SHADOW_MIDTONE_THRESHOLD);
-        if (randomDistribution(dev) < transition)
-            tone = midtoneColor;
-        else
-            tone = shadowColor;
+        tone = midtoneColor * transition + shadowColor * (1 - transition);
+//        if (randomDistribution(dev) < transition)
+//            tone = midtoneColor;
+//        else
+//            tone = shadowColor;
     } else
     {
         tone = shadowColor;