The spatial dimension of human settlements and establishments raises special decision problems in planning situations. Often there are multitudes of different criteria that have to be considered. Real world phenomena, in opposite to phenomena of an idealised mathematical or abstract world, are often vague, contradictory, and incomprehensible. Further, decisions about our physical environment often are of a multi criteria nature. We have in earlier research developed and tested the Ordered Weighted Average Procedure (OWA-procedure) for decision support in complex localisation decisions in physical planning outgoing from the basic methodologies for a multi criteria fuzzy decision support that already have been developed. However, the OWA-procedure in its current form is not able to capture the full complexity of most real decision situations. For example, in most real world situations, decisions in connection with competition, negotiation, time etc needs to be made. To be able to handle multi-actor decision situations, tools for visualization of the spatial situation to decide on, such as 3D modeling and Virtual Reality, in addition to fuzzy decision support is needed.