Architect Edgar Gonzalez is offering new ideas for the site
New designs to cover the road and railway line but retain Union Terrace Gardens in Aberdeen are being aired.
Peacock Visual Arts has been at loggerheads with Aberdeen City and Shire Economic Future (Acsef) over its plans for a civic square.
Oil tycoon Sir Ian Wood is backing the Acsef development plan, and is putting up £50m of his own money.
Architects working for Peacock, which plans a new centre in the gardens, say the plans could co-exist.
A public consultation is being held on the Acsef plans to create the £140m City Square in the centre of Aberdeen.
Acsef, a public-private development agency, says Aberdeen needs a vibrant, cultural civic space and gardens in the heart of the city.
The City Square Project is backed by Sir Ian Wood
However, approval for Peacock Visual Arts' new centre in the gardens has already been given, but it is said to be in jeopardy due to the other scheme.
More than 4,000 people are said to have signed a petition in support of Peacock's project.
Architect Edgar Gonzalez is now offering a range of "elegant" solutions for the future of the site.
He said: "We have spent a lot of time in Aberdeen now and have grown to know and respect the place.
"We all want to see Aberdeen going forward as a better, more vibrant city."