To attempt to explain - I followed CG Geek's tutorial for converting a satellite / aerial photo to a terrain mesh (https://youtu.be/Mj7Z1P2hUWk) - which worked fine, however I am curious if there is any way to convert the existing mesh colours (which are basically the colours from the photo) to different, more 'solid' colours (i.e. replacing each mesh grid colour with a similar colour within a certain threshold).
I am basically trying to make the terrain look defined. The only aerial photos available are fairly low resolution so when you zoom in it becomes obvious that it's a low-res photo stretched over the terrain.
Any suggestions appreciated.