Residents of Cobble Hill and South Brooklyn Heights allege that the Brooklyn Bridge Park Development Corporation, the 11-member board of officials appointed by Mayor Bloomberg and Governor Pataki to oversee the construction of a 1.3-mile strip of parkland along the East River, has not been forthcoming with renderings of the 30-story luxury condominium complex slated for the park’s southern tip.

Frustrated with what they say were misleading drawings circulated by the development corporation, residents of Willowtown, a small residential enclave in the South Heights, commissioned a local graphic designer, Roy Sloane, to produce a rendering of the proposed complex.

According to local politicians and development corporation officials, the condominiums, which will be situated at the park’s southern entrance, near the intersection of Atlantic Avenue and Furman Street, will produce a steady stream of revenue to cover the park’s estimated $15.2 million annual operating costs. In 2002, Messrs. Bloomberg and Pataki pledged a total of $150 million to build the park, but the city and state have not promised to fund the park’s upkeep.

“We all know what the construction is going to look like from your million dollar condo on Columbia Heights,” Mr. Sloane said, referring to the view of the apartment towers from an upscale area north of the park. “But there are no accurate drawings in the public realm of what the proposed construction will look like from the southern entrance of the park,” Mr. Sloane, a past president of the Cobble Hill Association, said.

The chairwoman of the Willowtown Association parks committee, Judith Francis, said that a PowerPoint presentation that development corporation officials delivered to community members in May featured renderings of the proposed tower from only two vantage points. One rendering was drawn from the perspective of a person standing at the edge of Pier 6. But Ms. Francis said: “We are not going to approach this park from the middle of the East River. We’re going to approach it from our neighborhood.”

A second rendering, from the northern edge of the park near Pier 1, faintly depicts the high-rise apartment towers on the distant horizon. Part of the complex is obscured by the red and yellow leaves of a maple tree situated in the foreground.

Last week, activists presented Mr. Sloane’s rendering to their City Council member, David Yassky, a longtime supporter of the park project. Mr.

Yassky told The New York Sun: “I think the park planners have tried to downplay the residential development. We need to have a full and honest debate about how much development is necessary.”

Development corporation officials, responding to community activists’ charges, told the Sun yesterday that an architecture firm, Michael Van Valkenburgh Associates, presented a rendering of the proposed apartment complex in three public meetings early this year at the firm’s Manhattan office. In that rendering, drawn from the vantage point of a person standing on the corner of Atlantic Avenue and Hicks Street, the apartment complex looms large over Willowtown and Cobble Hill. The executive director of the Brooklyn Heights Association, Judy Stanton, said that she saw the rendering from the Hicks Street vantage point in January. But members of the Cobble Hill and Willowtown Associations say that the Hicks Street rendering was not presented to their neighborhood groups, even though views from the homes in those communities would be affected by the proposed complex.

In the past week, development corporation officials have circulated what they say is a “corrected version” of Mr. Sloane’s rendering.

According to Mr. Van Valkenburgh’s firm, Mr. Sloane’s drawing exaggerates the size of the proposed towers. And a spokesman for a local business group, the Downtown Brooklyn Council, said that community members had countless chances to view a three-dimensional model of the park project, which included the proposed towers. “Roy [Sloane] went on a mission last week to ‘uncover’ something that hadn’t been released,” the spokesman, Lee Silberstein, said. “This isn’t new. The plan is what it is, and the public has had a lot of opportunity to comment on it.”

Several public events at which architects presented the three-dimensional model were well-advertised in February and March in a local weekly newspaper, the Brooklyn Heights Courier.

Community members are also furious that the park proposal, as it currently stands, does not include a plan for an indoor recreational facility on Pier 5, which neighborhood groups had long advocated. According to development corporation officials, the pier cannot physically support a large indoor facility without crumbling. They say that funds to reinforce the pier and construct the facility will have to be generated from private sources.

A former parks commissioner in the Koch and Giuliani administrations, Henry Stern, said that the high-rise at Pier 6 would produce a necessary independent revenue stream to fund the park’s maintenance. “The trouble with parks is that even if you put up the money to build them, you still have to run them,” Mr. Stern, who is now president of New York Civic, said. “And for years, the city has skimped on parks.”

The Willowtown Association was founded in the 1950s to fight Robert Moses’s plans for the Brooklyn-Queens Expressway, and Mr. Stern speculated that the neighborhood group’s storied history might have left members with a knee-jerk aversion to any sort of development. “Every land dispute we have in this city is cast as Jane Jacobs fighting Robert Moses,” Mr. Stern quipped. “The Willowtown people see themselves as Jacobins.”