[Update] New heightmap template: Taklamakan (Patreon)

Here is a very small update: heightmap templates are refactor and a new one is added - Taklamakan. The template generates a valley in the map center surrounded by high mountains. Due to the mountains the value is lacking precipitation and usually forms big desert.

The landscape generated resembles me the Taklamakan desert in Asia. That's one of my favorite desert and I decided to stick with this name for the template. I do realize most people don't know that Taklamakan is, so let's consider this as educational effort. The desert is so interesting that I bet you will enjoy checking it on Goggle maps.