diff --git a/templates/lv2/data/manifest.ttl.in b/templates/lv2/data/manifest.ttl.in
index 4dfa814..731c9cd 100644
--- a/templates/lv2/data/manifest.ttl.in
+++ b/templates/lv2/data/manifest.ttl.in
@@ -124,5 +124,6 @@
 {{?it.lv2.ui}}
 {{=it.tibia.lv2.ttlURI(it.lv2.ui.uri)}}
 	a ui:@UI_TYPE@ ;
-	ui:binary <{{=it.product.bundleName}}@DLL_SUFFIX@> .
+	ui:binary <{{=it.product.bundleName}}@DLL_SUFFIX@> ;
+	lv2:requiredFeature ui:idleInterface .
 {{?}}
diff --git a/templates/lv2/src/lv2.c b/templates/lv2/src/lv2.c
index 21e50da..f2c1fca 100644
--- a/templates/lv2/src/lv2.c
+++ b/templates/lv2/src/lv2.c
@@ -21,6 +21,7 @@
 #include <stdlib.h>
 #include <stdint.h>
 
+#define TEMPLATE_HAS_UI
 #include "data.h"
 #include "plugin.h"
 
@@ -301,48 +302,40 @@ typedef struct {
 } ui_instance;
 
 static LV2UI_Handle ui_instantiate(const LV2UI_Descriptor * descriptor, const char * plugin_uri, const char * bundle_path, LV2UI_Write_Function write_function, LV2UI_Controller controller, LV2UI_Widget * widget, const LV2_Feature * const * features) {
-	*widget = NULL;
+	char has_parent = 0;
+	void *parent = NULL;
+	for (size_t i = 0; features[i] != NULL; i++)
+		if (!strcmp(features[i]->URI, LV2_UI__parent)) {
+			has_parent = 1;
+			parent = features[i]->data;
+		}
 
-	ui_instance *instance = malloc(sizeof(ui_instance));
-	if (instance == NULL)
-		return NULL;
-
-	instance->display = XOpenDisplay(NULL);
-	if (instance->display == NULL) {
-		free(instance);
+	plugin_ui *instance = plugin_ui_create(has_parent, parent);
+	if (instance == NULL) {
+		*widget = NULL;
 		return NULL;
 	}
-
-	Window parent;
-	const char* missing = lv2_features_query(features,
-		LV2_UI__parent, &parent, false,
-		NULL);
-
-	int screen = DefaultScreen(instance->display);
-	instance->window = XCreateSimpleWindow(instance->display, missing ? RootWindow(instance->display, screen) : parent, 0, 0, 400, 200, 5, BlackPixel(instance->display, screen), WhitePixel(instance->display, screen));
-	//XSelectInput(instance->display, instance->window, ExposureMask | KeyPressMask);
-	XMapWindow(instance->display, instance->window);
-	XEvent ev;
-	while (XPending(instance->display))
-		XNextEvent(instance->display, &ev);
-	*widget = instance->window;
-
+	*widget = instance->widget;
 	return instance;
 }
 
 static void ui_cleanup(LV2UI_Handle handle) {
-	ui_instance *instance = (ui_instance *)handle;
-	XDestroyWindow(instance->display, instance->window);
-	XCloseDisplay(instance->display);
-	free(instance);
+	plugin_ui_free((plugin_ui *)handle);
 }
 
 static void ui_port_event(LV2UI_Handle handle, uint32_t port_index, uint32_t buffer_size, uint32_t format, const void * buffer) {
 	//TODO
 }
 
+static int ui_idle(LV2UI_Handle handle) {
+	plugin_ui_idle((plugin_ui *)handle);
+	return 0;
+}
+
 static const void * ui_extension_data(const char * uri) {
-	//TODO
+	static const LV2UI_Idle_Interface idle = { ui_idle };
+	if (!strcmp(uri, LV2_UI__idleInterface))
+		return &idle;
 	return NULL;
 }
 
diff --git a/templates/vst3/src/vst3.c b/templates/vst3/src/vst3.c
index 4268dab..2d3b57b 100644
--- a/templates/vst3/src/vst3.c
+++ b/templates/vst3/src/vst3.c
@@ -26,7 +26,9 @@
 #pragma GCC diagnostic ignored "-Wpedantic"
 #include "vst3_c_api.h"
 #pragma GCC diagnostic pop
+
 #include "data.h"
+#define TEMPLATE_HAS_UI
 #include "plugin.h"
 
 #if defined(__i386__) || defined(__x86_64__)
@@ -931,8 +933,8 @@ static Steinberg_tresult plugViewGetSize(void* thisInterface, struct Steinberg_V
 	//TODO
 	size->left = 0;
 	size->top = 0;
-	size->right = 0;
-	size->bottom = 0;
+	size->right = 600;
+	size->bottom = 400;
 	return Steinberg_kResultTrue;
 }
 
diff --git a/test/lv2-make.json b/test/lv2-make.json
new file mode 100644
index 0000000..5e903cb
--- /dev/null
+++ b/test/lv2-make.json
@@ -0,0 +1,6 @@
+{
+	"lv2_make": {
+		"cflags": "$(shell pkg-config --cflags pugl-cairo-0)",
+		"ldflags": "$(shell pkg-config --libs pugl-cairo-0)"
+	}
+}
diff --git a/test/plugin.h b/test/plugin.h
index e4a1dca..ed1fbc0 100644
--- a/test/plugin.h
+++ b/test/plugin.h
@@ -116,4 +116,67 @@ static void plugin_midi_msg_in(plugin *instance, size_t index, const uint8_t * d
 		instance->cutoff_k = data[1] < 64 ? (-0.19558034980097166f * data[1] - 2.361735109225749f) / (data[1] - 75.57552349522389f) : (393.95397927344214f - 7.660826245588588f * data[1]) / (data[1] - 139.0755234952239f);
 }
 
-#define PLUGIN_UI
+#ifdef TEMPLATE_HAS_UI
+# define PLUGIN_UI
+
+# include <pugl/pugl.h>
+# include <pugl/cairo.h>
+# include <cairo.h>
+
+typedef struct {
+	void *		widget;
+	PuglWorld *	world;
+	PuglView *	view;
+} plugin_ui;
+
+static PuglStatus onEvent(PuglView *view, const PuglEvent *event) {
+	switch (event->type) {
+		case PUGL_EXPOSE:
+		{
+			cairo_t *cr = (cairo_t *)puglGetContext(view);
+			cairo_set_source_rgb(cr, 1, 0.5, 0);
+			cairo_paint(cr);
+		}
+			break;
+		default:
+			break;
+	}
+	return PUGL_SUCCESS;
+}
+
+static plugin_ui *plugin_ui_create(char has_parent, void *parent) {
+	plugin_ui *instance = malloc(sizeof(plugin_ui));
+	if (instance == NULL)
+		return NULL;
+	instance->world = puglNewWorld(PUGL_MODULE, 0);
+	instance->view = puglNewView(instance->world);
+	puglSetSizeHint(instance->view, PUGL_DEFAULT_SIZE, 600, 400);
+	puglSetViewHint(instance->view, PUGL_RESIZABLE, 0);
+	puglSetBackend(instance->view, puglCairoBackend());
+	PuglRect frame = { 0, 0, 600, 400 };
+	puglSetFrame(instance->view, frame);
+	puglSetEventFunc(instance->view, onEvent);
+	if (has_parent) {
+		puglSetParentWindow(instance->view, (PuglNativeView)parent);
+	}
+	if (puglRealize(instance->view)) {
+		puglFreeView(instance->view);
+		puglFreeWorld(instance->world);
+		return NULL;
+	}
+	puglShow(instance->view, PUGL_SHOW_RAISE);
+	instance->widget = (void *)puglGetNativeView(instance->view);
+	return instance;
+}
+
+static void plugin_ui_free(plugin_ui *instance) {
+	puglFreeView(instance->view);
+	puglFreeWorld(instance->world);
+	free(instance);
+}
+
+static void plugin_ui_idle(plugin_ui *instance) {
+	puglUpdate(instance->world, 0);
+}
+
+#endif
diff --git a/test/run.sh b/test/run.sh
index 35643d0..023f3d5 100755
--- a/test/run.sh
+++ b/test/run.sh
@@ -6,7 +6,7 @@ $dir/../tibia $dir/product.json,$dir/company.json,$dir/vst3.json,$dir/vst3-make.
 cp $dir/plugin.h $dir/../out/vst3/src
 
 $dir/../tibia $dir/product.json,$dir/company.json,$dir/lv2.json $dir/../templates/lv2 $dir/../out/lv2
-$dir/../tibia $dir/product.json,$dir/company.json,$dir/lv2.json $dir/../templates/lv2-make $dir/../out/lv2
+$dir/../tibia $dir/product.json,$dir/company.json,$dir/lv2.json,$dir/lv2-make.json $dir/../templates/lv2-make $dir/../out/lv2
 cp $dir/plugin.h $dir/../out/lv2/src
 
 $dir/../tibia $dir/product.json,$dir/company.json $dir/../templates/web $dir/../out/web