I made another environment sketch with the 3DS. This time its also painted in 3D using five depth layers.
The 3D-effect can only be seen at the 3DS or other devices with a 3D-display. If you have one you can watch the painting in 3D here: http://colorslive.com/details/247032-speedpainting_03_by_lubbe.php There you can also watch how the image was painted.
There are videos for the first two 3DS paintings too.