diff --git a/effects/internal/blending.frag b/effects/internal/blending.frag
index 3507705c5..ab6171b73 100644
--- a/effects/internal/blending.frag
+++ b/effects/internal/blending.frag
@@ -28,10 +28,213 @@ const int BLEND_MODE_SUBTRACT = 24;
 const int BLEND_MODE_VIVIDLIGHT = 25;
 
 uniform sampler2D background;
-uniform sampler2D texture;
+uniform sampler2D foreground;
+
+uniform int blendmode;
+uniform float opacity;
+
 varying vec2 vTexCoord;
 
+// float blending functions
+float blend_color_burn(float base, float blend) {
+	return (blend==0.0)?blend:max((1.0-((1.0-base)/blend)),0.0);
+}
+
+float blend_color_dodge(float base, float blend) {
+	return (blend==1.0)?blend:min(base/(1.0-blend),1.0);
+}
+
+float blend_vivid_light(float base, float blend) {
+	return (blend<0.5)?blend_color_burn(base,(2.0*blend)):blend_color_dodge(base,(2.0*(blend-0.5)));
+}
+
+vec3 blend_vivid_light(vec3 base, vec3 blend) {
+	return vec3(blend_vivid_light(base.r,blend.r),blend_vivid_light(base.g,blend.g),blend_vivid_light(base.b,blend.b));
+}
+
+float blend_hard_mix(float base, float blend) {
+	return (blend_vivid_light(base,blend)<0.5)?0.0:1.0;
+}
+
+float blend_lighten(float base, float blend) {
+	return max(blend,base);
+}
+
+float blend_overlay(float base, float blend) {
+	return base<0.5?(2.0*base*blend):(1.0-2.0*(1.0-base)*(1.0-blend));
+}
+
+vec3 blend_overlay(vec3 base, vec3 blend) {
+	return vec3(blend_overlay(base.r,blend.r),blend_overlay(base.g,blend.g),blend_overlay(base.b,blend.b));
+}
+
+float blend_darken(float base, float blend) {
+	return min(blend, base);
+}
+
+float blend_linear_burn(float base, float blend) {
+	return max(base+blend-1.0,0.0);
+}
+
+vec3 blend_linear_burn(vec3 base, vec3 blend) {
+	return max(base+blend-vec3(1.0),vec3(0.0));
+}
+
+float blend_linear_dodge(float base, float blend) {
+	return min(base+blend,1.0);
+}
+
+vec3 blend_linear_dodge(vec3 base, vec3 blend) {
+	return min(base+blend,vec3(1.0));
+}
+
+float blend_linear_light(float base, float blend) {
+	return blend<0.5?blend_linear_burn(base,(2.0*blend)):blend_linear_dodge(base,(2.0*(blend-0.5)));
+}
+
+float blend_pin_light(float base, float blend) {
+	return (blend<0.5)?blend_darken(base,(2.0*blend)):blend_lighten(base,(2.0*(blend-0.5)));
+}
+
+float blend_reflect(float base, float blend) {
+	return (blend==1.0)?blend:min(base*base/(1.0-blend),1.0);
+}
+
+vec3 blend_reflect(vec3 base, vec3 blend) {
+	return vec3(blend_reflect(base.r,blend.r),blend_reflect(base.g,blend.g),blend_reflect(base.b,blend.b));
+}
+
+float blend_screen(float base, float blend) {
+	return 1.0-((1.0-base)*(1.0-blend));
+}
+
+float blend_substract(float base, float blend) {
+	return max(base+blend-1.0,0.0);
+}
+
+float blend_soft_light(float base, float blend) {
+	return (blend<0.5)?(2.0*base*blend+base*base*(1.0-2.0*blend)):(sqrt(base)*(2.0*blend-1.0)+2.0*base*(1.0-blend));
+}
+
+// adapted from https://github.com/jamieowen/glsl-blend
+// RGB blending function, alpha is handled below
+vec3 blend(vec3 base, vec3 blend) {
+	switch (blendmode) {
+
+	case BLEND_MODE_AVERAGE:
+		return (base+blend)/2.0;
+
+	case BLEND_MODE_COLORBURN:
+		return vec3(blend_color_burn(base.r, blend.r), blend_color_burn(base.g, blend.g), blend_color_burn(base.b, blend.b));
+
+	case BLEND_MODE_COLORDODGE:
+		return vec3(blend_color_dodge(base.r, blend.r), blend_color_dodge(base.g, blend.g), blend_color_dodge(base.b, blend.b));
+
+	case BLEND_MODE_DARKEN:
+		return vec3(blend_darken(base.r, blend.r), blend_darken(base.g, blend.g), blend_darken(base.b, blend.b));
+
+	case BLEND_MODE_DIFFERENCE:
+		return abs(base-blend);
+
+	case BLEND_MODE_EXCLUSION:
+		return base+blend-2.0*base*blend;
+
+	case BLEND_MODE_GLOW:
+		return blend_reflect(blend, base);
+
+	case BLEND_MODE_HARDLIGHT:
+		return blend_overlay(blend,base);
+
+	case BLEND_MODE_HARDMIX:
+		return vec3(blend_hard_mix(base.r,blend.r),blend_hard_mix(base.g,blend.g),blend_hard_mix(base.b,blend.b));
+
+	case BLEND_MODE_LIGHTEN:
+		return vec3(blend_lighten(base.r,blend.r),blend_lighten(base.g,blend.g),blend_lighten(base.b,blend.b));
+
+	case BLEND_MODE_LINEARBURN:
+	case BLEND_MODE_SUBTRACT:
+		return blend_linear_burn(base, blend);
+
+	case BLEND_MODE_ADD:
+	case BLEND_MODE_LINEARDODGE:
+		return blend_linear_dodge(base, blend);
+
+	case BLEND_MODE_LINEARLIGHT:
+		return vec3(blend_linear_light(base.r,blend.r),blend_linear_light(base.g,blend.g),blend_linear_light(base.b,blend.b));
+
+	case BLEND_MODE_MULTIPLY:
+		return (base * blend);
+
+	case BLEND_MODE_NEGATION:
+		return vec3(1.0)-abs(vec3(1.0)-base-blend);
+
+	case BLEND_MODE_OVERLAY:
+		return blend_overlay(base, blend);
+
+	case BLEND_MODE_PHOENIX:
+		return min(base,blend)-max(base,blend)+vec3(1.0);
+
+	case BLEND_MODE_PINLIGHT:
+		return vec3(blend_pin_light(base.r,blend.r),blend_pin_light(base.g,blend.g),blend_pin_light(base.b,blend.b));
+
+	case BLEND_MODE_REFLECT:
+		return blend_reflect(base, blend);
+
+	case BLEND_MODE_SCREEN:
+		return vec3(blend_screen(base.r,blend.r),blend_screen(base.g,blend.g),blend_screen(base.b,blend.b));
+
+	case BLEND_MODE_SUBSTRACT:
+		return max(base+blend-vec3(1.0),vec3(0.0));
+
+	case BLEND_MODE_SOFTLIGHT:
+		return vec3(blend_soft_light(base.r,blend.r),blend_soft_light(base.g,blend.g),blend_soft_light(base.b,blend.b));
+
+	case BLEND_MODE_VIVIDLIGHT:
+		return vec3(blend_vivid_light(base.r,blend.r),blend_vivid_light(base.g,blend.g),blend_vivid_light(base.b,blend.b));
+
+	case BLEND_MODE_NORMAL:
+	default:
+		return blend;
+
+	}
+}
+
 void main(void) {
-	// gl_FragColor = texture2D(background, vTexCoord);
-	gl_FragColor = texture2D(texture, vTexCoord);
+	vec4 bg_color = texture2D(background, vTexCoord);
+	vec4 fg_color = texture2D(foreground, vTexCoord);
+
+	// blend textures together
+	vec3 composite = blend(bg_color.rgb, fg_color.rgb);	
+
+	// add foreground and background alpha's together
+	vec4 full_composite = vec4(composite, bg_color.a + fg_color.a);
+
+	// restore background texture based on foreground's alpha
+	bool restore_bg = true;
+
+	// some blend modes don't need this
+	switch (blendmode) {
+	case BLEND_MODE_SCREEN:
+	case BLEND_MODE_LIGHTEN:
+	case BLEND_MODE_COLORDODGE:
+	case BLEND_MODE_LINEARDODGE:
+	case BLEND_MODE_ADD:
+	// case BLEND_MODE_OVERLAY:
+	case BLEND_MODE_SOFTLIGHT:
+	case BLEND_MODE_DIFFERENCE:
+	case BLEND_MODE_AVERAGE:
+	case BLEND_MODE_NEGATION:
+	case BLEND_MODE_PHOENIX:
+		restore_bg = false;
+	}
+
+	if (restore_bg) {
+		full_composite += vec4(bg_color.rgb*(1.0-fg_color.a), 0.0);
+	}
+
+	// mix via opacity
+	full_composite = mix(bg_color, full_composite, opacity);
+
+	// output to color
+	gl_FragColor = full_composite;
 }
\ No newline at end of file
diff --git a/effects/internal/transformeffect.cpp b/effects/internal/transformeffect.cpp
index 6bbcf1cfe..a095b3f5a 100644
--- a/effects/internal/transformeffect.cpp
+++ b/effects/internal/transformeffect.cpp
@@ -63,7 +63,7 @@ TransformEffect::TransformEffect(Clip* c, const EffectMeta* em) : Effect(c, em)
 	blend_mode_box->add_combo_item(tr("Lighten"), BLEND_MODE_LIGHTEN);
 	blend_mode_box->add_combo_item(tr("Screen"), BLEND_MODE_SCREEN);
 	blend_mode_box->add_combo_item(tr("Color Dodge"), BLEND_MODE_COLORDODGE);
-	blend_mode_box->add_combo_item(tr("Linear Dodge"), BLEND_MODE_LINEARDODGE);
+	blend_mode_box->add_combo_item(tr("Linear Dodge (Add)"), BLEND_MODE_LINEARDODGE);
 	blend_mode_box->add_combo_item(tr("Overlay"), BLEND_MODE_OVERLAY);
 	blend_mode_box->add_combo_item(tr("Soft Light"), BLEND_MODE_SOFTLIGHT);
 	blend_mode_box->add_combo_item(tr("Hard Light"), BLEND_MODE_HARDLIGHT);
@@ -74,9 +74,9 @@ TransformEffect::TransformEffect(Clip* c, const EffectMeta* em) : Effect(c, em)
 	blend_mode_box->add_combo_item(tr("Difference"), BLEND_MODE_DIFFERENCE);
 	blend_mode_box->add_combo_item(tr("Exclusion"), BLEND_MODE_EXCLUSION);
 	blend_mode_box->add_combo_item(tr("Reflect"), BLEND_MODE_REFLECT);
-	blend_mode_box->add_combo_item(tr("Subtract"), BLEND_MODE_SUBTRACT);
+//	blend_mode_box->add_combo_item(tr("Subtract"), BLEND_MODE_SUBTRACT);
 	blend_mode_box->add_combo_item(tr("Substract"), BLEND_MODE_SUBSTRACT);
-	blend_mode_box->add_combo_item(tr("Add"), BLEND_MODE_ADD);
+//	blend_mode_box->add_combo_item(tr("Add"), BLEND_MODE_ADD);
 	blend_mode_box->add_combo_item(tr("Average"), BLEND_MODE_AVERAGE);
 	blend_mode_box->add_combo_item(tr("Glow"), BLEND_MODE_GLOW);
 	blend_mode_box->add_combo_item(tr("Negation"), BLEND_MODE_NEGATION);
diff --git a/effects/test.frag b/effects/test.frag
new file mode 100644
index 000000000..bc16e5cb4
--- /dev/null
+++ b/effects/test.frag
@@ -0,0 +1,10 @@
+#version 110
+
+uniform sampler2D tex;
+varying vec2 vTexCoord;
+
+void main(void) {
+	vec4 c = texture2D(tex, vTexCoord);
+	c.rgb *= c.a;
+	gl_FragColor = c;
+}
\ No newline at end of file
diff --git a/effects/test.xml b/effects/test.xml
new file mode 100644
index 000000000..87d1bd6a2
--- /dev/null
+++ b/effects/test.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<effect name="Test">
+	<row name="Amount">
+		<field type="double" min="0" default="100" max="100" id="amount"/>
+	</row>
+	<shader vert="common.vert" frag="test.frag"/>
+</effect>
\ No newline at end of file
diff --git a/project/effect.cpp b/project/effect.cpp
index b47fa5c6b..2beee31f7 100644
--- a/project/effect.cpp
+++ b/project/effect.cpp
@@ -500,7 +500,7 @@ void Effect::load(QXmlStreamReader& stream) {
 									for (int l=0;l<row->fieldCount();l++) {
 										if (row->field(l)->id == attr.value()) {
 											field_number = l;
-											qInfo() << "Found field by ID";
+//											qInfo() << "Found field by ID";
 											break;
 										}
 									}
diff --git a/project/sourcescommon.cpp b/project/sourcescommon.cpp
index 31734b339..bb557381a 100644
--- a/project/sourcescommon.cpp
+++ b/project/sourcescommon.cpp
@@ -56,6 +56,24 @@ void SourcesCommon::show_context_menu(QWidget* parent, const QModelIndexList& it
 	QMenu* new_menu = menu.addMenu(tr("New"));
 	mainWindow->make_new_menu(new_menu);
 
+	QMenu* view_menu = menu.addMenu(tr("View"));
+
+	QAction* tree_view_action = view_menu->addAction(tr("Tree View"));
+	connect(tree_view_action, SIGNAL(triggered(bool)), project_parent, SLOT(set_tree_view()));
+
+	QAction* icon_view_action = view_menu->addAction(tr("Icon View"));
+	connect(icon_view_action, SIGNAL(triggered(bool)), project_parent, SLOT(set_icon_view()));
+
+	QAction* toolbar_action = view_menu->addAction(tr("Show Toolbar"));
+	toolbar_action->setCheckable(true);
+	toolbar_action->setChecked(project_parent->toolbar_widget->isVisible());
+	connect(toolbar_action, SIGNAL(triggered(bool)), project_parent->toolbar_widget, SLOT(setVisible(bool)));
+
+	QAction* show_sequences = view_menu->addAction(tr("Show Sequences"));
+	show_sequences->setCheckable(true);
+	show_sequences->setChecked(panel_project->sorter->get_show_sequences());
+	connect(show_sequences, SIGNAL(triggered(bool)), panel_project->sorter, SLOT(set_show_sequences(bool)));
+
 	if (items.size() > 0) {
 		Media* m = project_parent->item_to_media(items.at(0));
 
@@ -120,24 +138,6 @@ void SourcesCommon::show_context_menu(QWidget* parent, const QModelIndexList& it
 		}
 	}
 
-	menu.addSeparator();
-
-	QAction* tree_view_action = menu.addAction(tr("Tree View"));
-	connect(tree_view_action, SIGNAL(triggered(bool)), project_parent, SLOT(set_tree_view()));
-
-	QAction* icon_view_action = menu.addAction(tr("Icon View"));
-	connect(icon_view_action, SIGNAL(triggered(bool)), project_parent, SLOT(set_icon_view()));
-
-	QAction* toolbar_action = menu.addAction(tr("Show Toolbar"));
-	toolbar_action->setCheckable(true);
-	toolbar_action->setChecked(project_parent->toolbar_widget->isVisible());
-	connect(toolbar_action, SIGNAL(triggered(bool)), project_parent->toolbar_widget, SLOT(setVisible(bool)));
-
-	QAction* show_sequences = menu.addAction(tr("Show Sequences"));
-	show_sequences->setCheckable(true);
-	show_sequences->setChecked(panel_project->sorter->get_show_sequences());
-	connect(show_sequences, SIGNAL(triggered(bool)), panel_project->sorter, SLOT(set_show_sequences(bool)));
-
 	menu.exec(QCursor::pos());
 }
 
diff --git a/ui/renderfunctions.cpp b/ui/renderfunctions.cpp
index d0697056a..261eb2602 100644
--- a/ui/renderfunctions.cpp
+++ b/ui/renderfunctions.cpp
@@ -28,18 +28,11 @@ extern "C" {
 	#include <libavformat/avformat.h>
 }
 
-GLuint draw_clip(QOpenGLFramebufferObject* fbo, GLuint texture, bool clear) {
+void full_blit() {
 	glPushMatrix();
 	glLoadIdentity();
 	glOrtho(0, 1, 0, 1, -1, 1);
 
-	fbo->bind();
-
-	if (clear) {
-		glClear(GL_COLOR_BUFFER_BIT);
-	}
-
-	glBindTexture(GL_TEXTURE_2D, texture);
 	glBegin(GL_QUADS);
 	glTexCoord2f(0, 0); // top left
 	glVertex2f(0, 0); // top left
@@ -50,9 +43,41 @@ GLuint draw_clip(QOpenGLFramebufferObject* fbo, GLuint texture, bool clear) {
 	glTexCoord2f(0, 1); // bottom left
 	glVertex2f(0, 1); // bottom left
 	glEnd();
-	glBindTexture(GL_TEXTURE_2D, 0);
 
 	glPopMatrix();
+}
+
+void draw_clip(QOpenGLContext* ctx, GLuint fbo, GLuint texture, bool clear) {
+	ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
+
+	if (clear) {
+		glClear(GL_COLOR_BUFFER_BIT);
+	}
+
+	glBindTexture(GL_TEXTURE_2D, texture);
+
+	full_blit();
+
+	glBindTexture(GL_TEXTURE_2D, 0);
+
+	ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+}
+
+GLuint draw_clip(QOpenGLFramebufferObject* fbo, GLuint texture, bool clear) {
+	fbo->bind();
+
+	if (clear) {
+		glClear(GL_COLOR_BUFFER_BIT);
+	}
+
+	glBindTexture(GL_TEXTURE_2D, texture);
+
+	full_blit();
+
+	glBindTexture(GL_TEXTURE_2D, 0);
+
+	fbo->release();
+
 	return fbo->texture();
 }
 
@@ -78,8 +103,6 @@ void process_effect(Clip* c,
 			}
 			if (e->enable_superimpose) {
 				GLuint superimpose_texture = e->process_superimpose(timecode);
-				qDebug() << "superimpose texture was:" << superimpose_texture;
-				qDebug() << "composite texture was:" << composite_texture;
 
 				if (superimpose_texture == 0) {
 					qWarning() << "Superimpose texture was nullptr, retrying...";
@@ -88,7 +111,6 @@ void process_effect(Clip* c,
 					// if there is no previous texture, just return the superimposes texture
 					// UNLESS this is a shader-extended superimpose effect in which case,
 					// we'll need to draw it below
-					qDebug() << "returning superimpose directly";
 					composite_texture = superimpose_texture;
 				} else {
 					// if the source texture is not already a framebuffer texture,
@@ -361,7 +383,6 @@ GLuint compose_sequence(ComposeSequenceParams &params) {
 							if (e->container->selected) selected_effect = e;
 						}
 					}
-					qDebug() << "texture ID:" << textureID;
 
 					// using gizmo data, set definitive gizmo
 					if (selected_effect != nullptr) {
@@ -388,87 +409,111 @@ GLuint compose_sequence(ComposeSequenceParams &params) {
 
 					// == EFFECT CODE END ==
 
-					// == START FINAL DRAW ON SEQUENCE BUFFER ==
-
 					if (textureID > 0) {
-						// bind framebuffer
-						params.ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, final_fbo);
-
 						// set viewport to sequence size
-						glViewport(0, 0, s->width, s->height);
+						params.ctx->functions()->glViewport(0, 0, s->width, s->height);
 
-						// bind final texture
+
+
+						// == START RENDER CLIP IN CONTEXT OF SEQUENCE ==
+
+
+
+						// render a backbuffer
+						params.ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, params.backend_buffer1);
+
+						glClearColor(0.0, 0.0, 0.0, 0.0);
+						glClear(GL_COLOR_BUFFER_BIT);
+
+						// bind final clip texture
 						glBindTexture(GL_TEXTURE_2D, textureID);
 
 						// set texture filter to bilinear
-						glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-						glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+						params.ctx->functions()->glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+						params.ctx->functions()->glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+						// draw clip on screen according to gl coordinates
+						glBegin(GL_QUADS);
+
+						glTexCoord2f(coords.textureTopLeftX, coords.textureTopLeftY); // top left
+						glVertex2f(coords.vertexTopLeftX, coords.vertexTopLeftY); // top left
+						glTexCoord2f(coords.textureTopRightX, coords.textureTopRightY); // top right
+						glVertex2f(coords.vertexTopRightX, coords.vertexTopRightY); // top right
+						glTexCoord2f(coords.textureBottomRightX, coords.textureBottomRightY); // bottom right
+						glVertex2f(coords.vertexBottomRightX, coords.vertexBottomRightY); // bottom right
+						glTexCoord2f(coords.textureBottomLeftX, coords.textureBottomLeftY); // bottom left
+						glVertex2f(coords.vertexBottomLeftX, coords.vertexBottomLeftY); // bottom left
+
+						glEnd();
+
+						// release final clip texture
+						glBindTexture(GL_TEXTURE_2D, 0);
+
+						params.ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+
+
+
+						// == END RENDER CLIP IN CONTEXT OF SEQUENCE ==
+
+
+
+						//
+						//
+						// PROCESS POST-SHADERS
+						//
+						//
+
+
+
+						// copy front buffer to back buffer
+						draw_clip(params.ctx, params.backend_buffer2, params.main_attachment, true);
+
+
+
+						// == START FINAL DRAW ON SEQUENCE BUFFER ==
+
+
+
+						// bind front buffer as draw buffer
+						params.ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, final_fbo);
+
+						// load background texture into texture unit 0
+						params.ctx->functions()->glActiveTexture(GL_TEXTURE0 + 0); // Texture unit 0
+						params.ctx->functions()->glBindTexture(GL_TEXTURE_2D, params.backend_attachment2);
+
+						// load foreground texture into texture unit 1
+						params.ctx->functions()->glActiveTexture(GL_TEXTURE0 + 1); // Texture unit 1
+						params.ctx->functions()->glBindTexture(GL_TEXTURE_2D, params.backend_attachment1);
 
 						// bind and configure blending mode shader
 						params.blend_mode_program->bind();
-						params.blend_mode_program->setUniformValue("blend_mode", coords.blendmode);
+						params.blend_mode_program->setUniformValue("blendmode", coords.blendmode);
 						params.blend_mode_program->setUniformValue("opacity", coords.opacity);
+						params.blend_mode_program->setUniformValue("background", 0);
+						params.blend_mode_program->setUniformValue("foreground", 1);
 
-						// draw clip on screen
-						glBegin(GL_QUADS);
+						glClear(GL_COLOR_BUFFER_BIT);
 
-						if (coords.grid_size <= 1) {
-							glTexCoord2f(coords.textureTopLeftX, coords.textureTopLeftY); // top left
-							glVertex2f(coords.vertexTopLeftX, coords.vertexTopLeftY); // top left
-							glTexCoord2f(coords.textureTopRightX, coords.textureTopRightY); // top right
-							glVertex2f(coords.vertexTopRightX, coords.vertexTopRightY); // top right
-							glTexCoord2f(coords.textureBottomRightX, coords.textureBottomRightY); // bottom right
-							glVertex2f(coords.vertexBottomRightX, coords.vertexBottomRightY); // bottom right
-							glTexCoord2f(coords.textureBottomLeftX, coords.textureBottomLeftY); // bottom left
-							glVertex2f(coords.vertexBottomLeftX, coords.vertexBottomLeftY); // bottom left
-						} else {
-							float rows = coords.grid_size;
-							float cols = coords.grid_size;
-
-							for (int k=0;k<rows;k++) {
-								float row_prog = float(k)/rows;
-								float next_row_prog = float(k+1)/rows;
-								for (int j=0;j<cols;j++) {
-									float col_prog = float(j)/cols;
-									float next_col_prog = float(j+1)/cols;
-
-									float vertexTLX = float_lerp(coords.vertexTopLeftX, coords.vertexBottomLeftX, row_prog);
-									float vertexTRX = float_lerp(coords.vertexTopRightX, coords.vertexBottomRightX, row_prog);
-									float vertexBLX = float_lerp(coords.vertexTopLeftX, coords.vertexBottomLeftX, next_row_prog);
-									float vertexBRX = float_lerp(coords.vertexTopRightX, coords.vertexBottomRightX, next_row_prog);
-
-									float vertexTLY = float_lerp(coords.vertexTopLeftY, coords.vertexTopRightY, col_prog);
-									float vertexTRY = float_lerp(coords.vertexTopLeftY, coords.vertexTopRightY, next_col_prog);
-									float vertexBLY = float_lerp(coords.vertexBottomLeftY, coords.vertexBottomRightY, col_prog);
-									float vertexBRY = float_lerp(coords.vertexBottomLeftY, coords.vertexBottomRightY, next_col_prog);
-
-									glTexCoord2f(float_lerp(coords.textureTopLeftX, coords.textureTopRightX, col_prog), float_lerp(coords.textureTopLeftY, coords.textureBottomLeftY, row_prog)); // top left
-									glVertex2f(float_lerp(vertexTLX, vertexTRX, col_prog), float_lerp(vertexTLY, vertexBLY, row_prog)); // top left
-									glTexCoord2f(float_lerp(coords.textureTopLeftX, coords.textureTopRightX, next_col_prog), float_lerp(coords.textureTopRightY, coords.textureBottomRightY, row_prog)); // top right
-									glVertex2f(float_lerp(vertexTLX, vertexTRX, next_col_prog), float_lerp(vertexTRY, vertexBRY, row_prog)); // top right
-									glTexCoord2f(float_lerp(coords.textureBottomLeftX, coords.textureBottomRightX, next_col_prog), float_lerp(coords.textureTopRightY, coords.textureBottomRightY, next_row_prog)); // bottom right
-									glVertex2f(float_lerp(vertexBLX, vertexBRX, next_col_prog), float_lerp(vertexTRY, vertexBRY, next_row_prog)); // bottom right
-									glTexCoord2f(float_lerp(coords.textureBottomLeftX, coords.textureBottomRightX, col_prog), float_lerp(coords.textureTopLeftY, coords.textureBottomLeftY, next_row_prog)); // bottom left
-									glVertex2f(float_lerp(vertexBLX, vertexBRX, col_prog), float_lerp(vertexTLY, vertexBLY, next_row_prog)); // bottom left
-								}
-							}
-						}
-
-						glEnd();
+						full_blit();
 
 						// release blend mode shader
 						params.blend_mode_program->release();
 
-						// unbind texture
-						glBindTexture(GL_TEXTURE_2D, 0);
+						// unbind texture from texture unit 1
+						params.ctx->functions()->glBindTexture(GL_TEXTURE_2D, 0);
+
+						// unbind texture from texture unit 0
+						params.ctx->functions()->glActiveTexture(GL_TEXTURE0 + 0); // Texture unit 0
+						params.ctx->functions()->glBindTexture(GL_TEXTURE_2D, 0);
 
 						// unbind framebuffer
-						params.ctx->functions()->glBindFramebuffer(GL_TEXTURE_2D, 0);
+						params.ctx->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
 
+
+
+						// == END FINAL DRAW ON SEQUENCE BUFFER ==
 					}
 
-					// == END FINAL DRAW ON SEQUENCE BUFFER ==
-
 					// prepare gizmos
 					if ((*params.gizmos) != nullptr
 							&& params.nests.isEmpty()
diff --git a/ui/renderfunctions.h b/ui/renderfunctions.h
index 852c2a2fe..0830d6cb4 100644
--- a/ui/renderfunctions.h
+++ b/ui/renderfunctions.h
@@ -24,6 +24,7 @@ struct ComposeSequenceParams {
 	QOpenGLShaderProgram* blend_mode_program;
 	QOpenGLShaderProgram* premultiply_program;
 	GLuint main_buffer;
+	GLuint main_attachment;
 	GLuint backend_buffer1;
 	GLuint backend_attachment1;
 	GLuint backend_buffer2;
diff --git a/ui/renderthread.cpp b/ui/renderthread.cpp
index 37face307..a8ef4fee5 100644
--- a/ui/renderthread.cpp
+++ b/ui/renderthread.cpp
@@ -70,11 +70,11 @@ void RenderThread::run() {
 
 					// create texture
 					glGenTextures(1, &front_texture);
-					glGenTextures(1, &back_buffer_1);
-					glGenTextures(1, &back_buffer_2);
+					glGenTextures(1, &back_texture_1);
+					glGenTextures(1, &back_texture_2);
 
 					GLuint fbos[3] = {front_buffer, back_buffer_1, back_buffer_2};
-					GLuint textures[3] = {front_buffer, back_buffer_1, back_buffer_2};
+					GLuint textures[3] = {front_texture, back_texture_1, back_texture_2};
 
 					for (int i=0;i<3;i++) {
 						// bind framebuffer for attaching
@@ -85,7 +85,7 @@ void RenderThread::run() {
 
 						// allocate storage for texture
 						glTexImage2D(
-							GL_TEXTURE_2D, 0, GL_RGB, seq->width, seq->height, 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr
+							GL_TEXTURE_2D, 0, GL_RGBA, seq->width, seq->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr
 						);
 
 						// set texture filtering to bilinear
@@ -174,6 +174,7 @@ void RenderThread::paint() {
 	params.backend_attachment1 = back_texture_1;
 	params.backend_attachment2 = back_texture_2;
 	params.main_buffer = front_buffer;
+	params.main_attachment = front_texture;
 	compose_sequence(params);
 
 	texture_failed = params.texture_failed;
diff --git a/ui/timelinewidget.cpp b/ui/timelinewidget.cpp
index bacc19133..0d6bb4a2a 100644
--- a/ui/timelinewidget.cpp
+++ b/ui/timelinewidget.cpp
@@ -869,7 +869,6 @@ void TimelineWidget::mouseReleaseEvent(QMouseEvent *event) {
 							// default audio effects (after custom effects)
 							c->effects.append(create_effect(c, get_internal_meta(EFFECT_INTERNAL_VOLUME, EFFECT_TYPE_EFFECT)));
 							c->effects.append(create_effect(c, get_internal_meta(EFFECT_INTERNAL_PAN, EFFECT_TYPE_EFFECT)));
-							//c->media_type = MEDIA_TYPE_TONE;
 						}
 
 						push_undo = true;
@@ -884,7 +883,10 @@ void TimelineWidget::mouseReleaseEvent(QMouseEvent *event) {
 
 				for (int i=0;i<panel_timeline->ghosts.size();i++) {
 					const Ghost& g = panel_timeline->ghosts.at(i);
-					if (g.in != g.old_in || g.out != g.old_out || g.clip_in != g.old_clip_in) {
+					if (g.in != g.old_in
+							|| g.out != g.old_out
+							|| g.clip_in != g.old_clip_in
+							|| g.track != g.old_track) {
 						process_moving = true;
 						break;
 					}