Decal Blending
This is based heavily on the tutorial by Aloys, but uses different features to accomplish a similar effect.
Contents
Decal Material Blending (Relto Style)
If you look around Relto, or many other cyan ages, like Kemo, you'll see places where one texture seems to fade seamlessly into another. In many cases this transitioning between two textures is done by by making the edge of one of them transparent. For an example, we're going to blend this grassy top onto this rocky cylinder.
For this tutorial, I'm going to assume you know how to edit meshes and materials in blender.
Create the decal meshes
Go into edit mode and get yourself sphere. (Space-Add-Mesh-UVSphere-Segments:12) Delete (X) the bottom half of the vertices. Extrude (E) it downward to create the cylinder.
Select the top portion of your object and duplicate it. Separate it from the rest of your object. (P-Selected) Then delete the top portion of the object. (not really necessary, but it's a waste of faces)
Set the material properties
Paint the Alpha layer
Export and see if it worked
Adjustments