For a succesful and sustainable forest management, digital images which are taken below the forest canopy or with airborne and satellite sensors, can provide important information which may not be visible for the human eye. However, the interpretation and analysis of these images is rather complex. The optical signal is influenced by different internal and external parameters like the optical properties of the different forest elements, the forest structure, the atmosphere, the view and sensor geometry. The aim of this project is to develop a virtual laboratory for the accu- rate investigation of the light-forest interaction process. To develop the virtual laboratory a three dimensional forest model or Forest scene model will be constructed first based on a limi- ted amount of radiometric and geometric parameters. Next, this FS-model will be visualised by simulating the interaction of the light with the forest. ....