I'm currently testing out Unity 3D and one of the things I can not figure out, is how to create textures that are what I would describe as "Soft Gradient".
Here is an image of what I would describe the textures as "Soft Gradient"
If you look at the top of the hexagons (the grass). you can see that its not just one color, its a texture that is a "Soft Gradient".
Currently, this is what I have,

Does anyone have tips or can help my understand how to make my hexagon pillars look similar to the ones in the picture?