v.extrude Extrudes flat vector object to 3D with defined height. Vector (v.*) ParameterVector|input|Name of input 2D vector map|-1|False ParameterString|where|WHERE conditions of SQL statement without 'where' keyword|None|True|True ParameterNumber|zshift|Shifting value for z coordinates|0.0|None|0.0|True ParameterString|height|Fixed height for 3D vector objects (float)|None|False|True ParameterTableField|height_column|Name of attribute column with object heights|input|0|True ParameterRaster|elevation|Elevation raster for height extraction|True ParameterSelection|method|Sampling interpolation method|nearest;bilinear;bicubic|0 ParameterNumber|scale|Scale factor sampled raster values|0.0|None|1.0|True ParameterString|null_value|Height for sampled raster NULL values|None|False|True *ParameterBoolean|-t|Trace elevation|False OutputVector|output|3D Vector