Lagoa, a developer of 3-D rendering and collaboration software, has raised $1.6 million in seed funding. Participating investors include 500 Startups, Atlas Venture, Real Ventures and Rho Ventures. The company’s cloud-based software tools enable subscribers to collaborate in real-time to produce “photoreal” 3-D renderings. Users also can create their own 3-D apps on the platform. Lagoa is headquartered in Montreal, Canada, with regional offices in Cambridge, MA and Bonn, Germany.