Documentation | Help File | 3D | Grid | mnulayermoveup
Raster dialog box, 3D tab.
Treat layer as 2D - the Z coordinate is neglected (even if present) and the layer is drawn as a flat texture; in presence of a digital elevation model (DEM) layer the texture is spread over the DEM.
Treat layer as Elevation Model (DEM) - the layer is presented as a three dimensional terrain model; especially useful to force this representation if a DEM-type layer is not recognized as a DEM.