diff --git a/io_mesh_uv_layout/export_uv_png.py b/io_mesh_uv_layout/export_uv_png.py
index 784337be4..212b2bab1 100644
--- a/io_mesh_uv_layout/export_uv_png.py
+++ b/io_mesh_uv_layout/export_uv_png.py
@@ -16,7 +16,7 @@ except ImportError:
 
 
 def export(filepath, face_data, colors, width, height, opacity):
-    offscreen = gpu.types.GPUOffScreen(width, height)
+    offscreen = gpu.types.GPUOffScreen(width, height, format="R8")
     offscreen.bind()
 
     try:
@@ -24,8 +24,8 @@ def export(filepath, face_data, colors, width, height, opacity):
         fb.clear(color=(0.0, 0.0, 0.0, 0.0))
         draw_image(face_data, opacity)
 
-        pixel_data = fb.read_color(0, 0, width, height, 4, 0, 'UBYTE')
-        pixel_data.dimensions = width * height * 4
+        pixel_data = fb.read_color(0, 0, width, height, 1, 0, 'UBYTE')
+        pixel_data.dimensions = width * height * 1
         save_pixels(filepath, pixel_data, width, height)
     finally:
         offscreen.unbind()
@@ -97,7 +97,7 @@ def draw_lines(face_data):
     shader = gpu.shader.from_builtin('POLYLINE_UNIFORM_COLOR')
     shader.uniform_float("viewportSize", gpu.state.viewport_get()[2:])
     shader.uniform_float("lineWidth", 1.0)
-    shader.uniform_float("color", (0.0, 0.0, 0.0, 1.0))
+    shader.uniform_float("color", (1.0, 1.0, 1.0, 1.0))
 
     batch = batch_for_shader(shader, 'LINES', {"pos": coords})
     batch.draw(shader)
@@ -105,15 +105,19 @@ def draw_lines(face_data):
 
 def save_pixels(filepath, pixel_data, width, height):
     if oiio:
-        spec = oiio.ImageSpec(width, height, 4, "uint8")
+        spec = oiio.ImageSpec(width, height, 1, "uint8")
         image = oiio.ImageOutput.create(filepath)
         image.open(filepath, spec)
         image.write_image(pixel_data)
         image.close()
         return
 
-    image = bpy.data.images.new("temp", width, height, alpha=True)
+    image = bpy.data.images.new("temp", width, height, alpha=False)
     image.filepath = filepath
-    image.pixels = [v / 255 for v in pixel_data]
+    for i in range(0,width*height):
+        image.pixels[i * 3 + 0] = pixel_data[i]
+        image.pixels[i * 3 + 1] = pixel_data[i]
+        image.pixels[i * 3 + 2] = pixel_data[i]
+    #image.pixels = [v / 255 for v in pixel_data]
     image.save()
     bpy.data.images.remove(image)