here's one painting where I played around with wiping the sea and the sky with a small leather. Done with Koh-i-Noor pastels and pastel pens on hand-moulded Hahnemühle pastel paper (size appr. 24 x 30 cm).
as said already, I started sketching and painting due to astronomy observations. But sometimes it's poor and cloudy wheather so I widened my scope and started sketching nature (mainly from photos taken during vacation).
Here's one example of the North sea at the beaches of the...