I moved to Austin in 2014. Austin is really pretty in many ways and has a small town feel (which is changing unfortunately since then).
Although, I do live outside Austin downtown there are plenty of nice sights to see and photograph.
A visit to Austin downtown in May 2016 produced some of these below.
There is a really nice Lamar pedestrian walkway across, which allows you view the Lamar Pedestrian bridge as well as the downtown area.
Near the dog park across the Long Center, you can also find the Stevie Ray Vaughan statue, which serves as a nice background for the Austin Downtown.