Comment by shrx

I don't get it why ML is needed. Just download a DEM (for example, an aerial LIDAR map or SRTM), import it in QGIS along with your base map raster, choose the appropriate shading parameters and combine the two with appropriate blending.

edit: and if you're feeling fancy, you can render the relief shading in blender: https://somethingaboutmaps.wordpress.com/2017/11/16/creating...