The artists were able to apply paint more thickly and use heavier brush stokes, thereby introducing a unique feel to their paintings.

The artists were able to apply paint more thickly and use heavier brush stokes. Applying paint more thickly and using heavier brush stokes introduced a unique feel to their paintings.

(comma) , introducing = and the artists introduced a unique ~ : No, not artists. It was the new painting technique.


(comma) , introducing = and it(=applying paint more thickly and using heavier brush stokes) introduced a unique ~

Thanks for your help!

Then is that sentence also participle clauses?

"…, introducing a unique feel to their paintings." is a participIAL phrase

Here is a link to the entry on dangling modifiers.

my bad! a participial phrase.
Thanks guys!