If you have a raster layer with terrain data in it, you can quickly apply really cool effects in QGIS, with only a few clicks. If you duplicate the layer a couple of times and apply a few more effects you can take it even further. Take a look at the video to see what I mean.
Terrain data used in the video: https://automaticknowledge.co.uk/reso...
A Great Britain boundary file you can use to match what I do at the end: https://geoportal.statistics.gov.uk/d...
See my intro and intermediate QGIS courses for more: https://www.udemy.com/user/alasdairr...