diff --git a/ImpressionistUI.cpp b/ImpressionistUI.cpp
index d804669..36542b1 100644
--- a/ImpressionistUI.cpp
+++ b/ImpressionistUI.cpp
@@ -621,6 +621,44 @@ void ImpressionistUI::cb_tracer_update(Fl_Widget* o, void* v)
 	uiPtr->m_paintView->redraw();
 }
 
+void ImpressionistUI::cb_open_dissolve_dialog(Fl_Widget* o, void*)
+{
+	whoami(dynamic_cast<Fl_Menu_*>(o))->m_dissolveDialog->show();
+}
+
+
+void ImpressionistUI::cb_dissolve(Fl_Widget* o, void*)
+{
+	auto* uiPtr = static_cast<ImpressionistUI*>(o->user_data());
+
+	const auto dissolveRatio = uiPtr->m_dissolveOpacitySlider->value() / 100.0;
+
+	auto* fileName = fl_file_chooser("Open File?", "*.bmp", nullptr);
+	if (fileName != nullptr) {
+		auto width = 0;
+		auto height = 0;
+		ImageWrapper imageWrapper = {
+			readBMP(fileName, width, height),
+			{ width, height }
+		};
+
+		ImageUtils::eachPixel<unsigned char>(uiPtr->m_pDoc->m_ucPainting, {uiPtr->m_pDoc->m_nPaintWidth, uiPtr->m_pDoc->m_nPaintHeight }, [&](unsigned char* rgbArray, const long x, const long y)
+		{
+			auto* otherPixel = imageWrapper.getPixelPtr(x, y);
+			rgbArray[0] = static_cast<unsigned char>(dissolveRatio * rgbArray[0] + (1 - dissolveRatio) * otherPixel[0]);
+			rgbArray[1] = static_cast<unsigned char>(dissolveRatio * rgbArray[1] + (1 - dissolveRatio) * otherPixel[1]);
+			rgbArray[2] = static_cast<unsigned char>(dissolveRatio * rgbArray[2] + (1 - dissolveRatio) * otherPixel[2]);
+		});
+
+		uiPtr->m_paintView->redraw();
+	}
+	else
+	{
+		fl_alert("File not selected!");
+	}
+}
+
+
 
 
 //---------------------------------- per instance functions --------------------------------------
@@ -753,6 +791,7 @@ Fl_Menu_Item ImpressionistUI::menuitems[] = {
     { "&Swap Content", FL_ALT + 's', (Fl_Callback*)ImpressionistUI::cb_swap_content },
     { "&Undo", FL_ALT + 'z', (Fl_Callback*)ImpressionistUI::cb_undo },
     { "Tracer...", 0, cb_open_tracer_dialog },
+    { "Dissolve...", 0, cb_open_dissolve_dialog },
     { "&Auto Fill", FL_ALT + 'f', (Fl_Callback*)ImpressionistUI::cb_auto_fill_menu },
     { "&Load Another Img", FL_ALT + 'l', (Fl_Callback*)ImpressionistUI::cb_load_another_image },
     { "&Load Mural Img", FL_ALT + 'm', (Fl_Callback*)ImpressionistUI::cb_load_mural_image },
@@ -1124,4 +1163,21 @@ ImpressionistUI::ImpressionistUI()
 		m_tracerOpacitySlider->callback(cb_tracer_update);
     }
 	m_tracerDialog->end();
+
+	m_dissolveDialog = new Fl_Window(320, 100, "Dissolve...");
+    {
+		m_dissolveOpacitySlider = new Fl_Value_Slider(10, 10, 300, 20, "Original Opacity");
+		m_dissolveOpacitySlider->user_data(static_cast<void*>(this));
+		m_dissolveOpacitySlider->type(FL_HOR_NICE_SLIDER);
+		m_dissolveOpacitySlider->minimum(0.0);
+		m_dissolveOpacitySlider->maximum(100.0);
+		m_dissolveOpacitySlider->step(1.0);
+		m_dissolveOpacitySlider->value(50.0);
+		m_dissolveOpacitySlider->align(FL_ALIGN_BOTTOM);
+
+		m_dissolveLoadImageBtn = new Fl_Button(110, 65, 100, 25, "Load Image");
+		m_dissolveLoadImageBtn->user_data(static_cast<void*>(this));
+		m_dissolveLoadImageBtn->callback(cb_dissolve);
+    }
+	m_dissolveDialog->end();
 }
diff --git a/impressionist.vcxproj b/impressionist.vcxproj
index 751de96..b55b47c 100644
--- a/impressionist.vcxproj
+++ b/impressionist.vcxproj
@@ -63,7 +63,7 @@
       <WarningLevel>Level3</WarningLevel>
       <MinimalRebuild>true</MinimalRebuild>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>local\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>local\include;$(MSBuildProjectDirectory);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AssemblerListingLocation>c:\temp\</AssemblerListingLocation>
       <PrecompiledHeaderOutputFile>c:\temp\impressionist.pch</PrecompiledHeaderOutputFile>
diff --git a/impressionistUI.h b/impressionistUI.h
index f81b146..75aaa7d 100644
--- a/impressionistUI.h
+++ b/impressionistUI.h
@@ -78,6 +78,10 @@ class ImpressionistUI {
 	Fl_Window*			m_tracerDialog;
 	Fl_Value_Slider*	m_tracerOpacitySlider;
 
+	Fl_Window*			m_dissolveDialog;
+	Fl_Value_Slider*	m_dissolveOpacitySlider;
+	Fl_Button*			m_dissolveLoadImageBtn;
+
 
 	// Member functions
 	void				setDocument(ImpressionistDoc* doc);
@@ -203,6 +207,8 @@ class ImpressionistUI {
 	static Fl_Callback cb_open_colors_dialog;
 	static Fl_Callback cb_open_tracer_dialog;
 	static Fl_Callback cb_tracer_update;
+	static Fl_Callback cb_open_dissolve_dialog;
+	static Fl_Callback cb_dissolve;
 
 };
 
diff --git a/readme.md b/readme.md
index 412e072..1081532 100644
--- a/readme.md
+++ b/readme.md
@@ -23,7 +23,7 @@ Programming project 1 of HKUST Computer Graphics course COMP4411
 - [x] (1B) change color of image (change channel)
 - [x] **(1B)** blur brush and sharpen brush (wait for kernel brush)
 - [x] **(1B)** undo
-- [ ] (1B) Dissolve one image into another
+- [x] (1B) Dissolve one image into another
   - [x] (1B1W) original image overlay
 - [x] _(1B1W)_ mural image (load another image without resetting)
 - [x] (1B1W) alpha mapping brush