Thank you very much for responding to my post. I've also been looking at some of Germanus's other maps from his portfolio - some of his maps (particularly his black and white variants) have used something similar to this matte effect (albeit with black outlines too) that I have used with my project that I think I could replicate as well. I think it might be doable in the way that I managed to figure out myself...

As far as drawing the portraits of heads blowing some wind on the map - I am currently looking to harmonise the simplistic map seen in more modern maps with the elements seen in Ptolemy, so it is not something that I am planning on doing for the project that I am currently undertaking. But thanks for the idea anyways.