In 1894 he became second president of the group after Bruno Piglhein's death. He was appointed professor at the Karlsruhe fine arts academy in 1899, so resigned and was replaced by Fritz von Uhde.
Although Dill was supportive of modernist tendencies in painting, his own works were fairly conservative. His mature style tended to simplification through use of broad brushwork as well as somewhat decorative composition. His favored subjects were trees and boating scenes from the Venice Lagoon, especially towards its southern end and the town of Chioggia.
"Fishermen in Venice" show Dill's earlier traditional style.
The title doesn't translate easily into English, but refers to a landscape featuring woods and water. Modernist influence is clearly found here.
"Morning" and the painting above it are characteristic of Dill's tree paintings, though Der Morgen seems more of a sketch than his usual tree art.
No tile or date for this, but it shows that he didn't exclusively paint trees and boats. However, he tended to avoid painting people other than small, incidental figures in his boat paintings.
"Sailboats in a Canal" is in a style different from the paintings below that also are said to be from around 1890, so I wonder when it was made.
"Arrival of the Fishboats" and the following painting are done in a decorative, broad-brush style that yields a modernist feeling without much distortion of the subject matter.
Pellestrina is a barrier island to the Venice Lagoon.
"Boats in Harbor" apparently was painted later than the images above and incorporates a slight shift towards Expressionism and away from Dill's faintly Romantic earlier views.