nviz Visualization and animation tool for GRASS data. Visualization(NVIZ) ParameterMultipleInput|elevation|Name of elevation raster map|3|False ParameterMultipleInput|color|Name of raster map(s) for Color|3|False ParameterMultipleInput|vector|Name of vector lines/areas overlay map(s)|-1|False ParameterMultipleInput|point|Name of vector points overlay file(s)|0|True ParameterMultipleInput|volume|Name of existing 3d raster map|3|True