A number of 3D geo-browsers, both open source as well as part of proprietary GIS enterprise solutions, are used during the daily practice to access to geospatial data, available within SDIs, via OGC-compliant web-services. However simple data access is not sufficient for complex tasks such as those required for planning or management of environmental resources. These tasks in fact often require the availability of geo-processing functionalities of various type for statistical, analytical or geographical functionalities. These processes, although typical of standard GIS solutions, are not available within web based 3D geo-browsers. Features of the system presented in this paper, include the ability to visually build, encapsulate, and parameterize complex processing models and present the results inside the 3D environment. Furthermore the interface also provides mechanisms to represent geographical features retrieved from web map services or web feature services.