Architecture firm Kohn Pedersen Fox has released renderings of a 68-storey skyscraper proposed for Downtown Brooklyn, as the New York borough's skyline continues to grow.

Measuring 720 feet (219 metres) tall, KPF's Brooklyn Point tower will become Brooklyn's second tallest building, behind SHoP Architect's 1,000-foot (305-metre) skyscraper, which has already been approved for the area.

Together, they will dramatically impact New York City's skyline across the East River from Manhattan, which has gradually been rising for several years.

Two renderings of Brooklyn Point were released earlier this week, showing a light-coloured structure that offsets the many brick towers in the neighbourhood and featuring stacked frames of glazed walls.

"The custom curtain wall's double-height frames accentuate the verticality of the building and the facetted planes add depth and texture to the exterior," said KPF in a statement.

The project will be led by New York City real-estate developer Extell, which is also behind Manhattan's Central Park Tower, set to become the tallest residential skyscraper in the world.

Brooklyn Point will be located at 138 Willoughby Street in the heart of Downtown Brooklyn, two blocks from one of the area's only green spaces, Fort Greene Park. The location will be renamed 1 City Point, as the tower will join Extell's neighbouring City Point Tower One, which broke ground spring 2017.

The building will house 458 residences, ranging from studios to three-bedroom apartments. Residents will have access to a variety of indoor and outdoor entertainment and recreation spaces. There will also be provision for retail at the tower's base.

Although relatively new to Brooklyn, KPF has designed many skyscrapers in Manhattan. The studio completed 10 Hudson Yards in June 2016, while construction of its taller sister tower at 30 Hudson Yards recently surpassed it in height.

The firm's One Vanderbilt tower beside Grand Central Station is currently underway, and is set to become New York's second tallest skyscraper once finished. KPF has also completed a skinny residential building in the Flatiron District, and is working on another condo development close to the World Trade Center site.

Renderings are by Williams NY.