Is there any way to blend a texture on certain verts or faces. This would be very helpful for when two textures meet up if the faded to a 50% opacity where they met so there was no texture edge especially for terrains.

Thanks for any help

It would be wonderful if there was a button to get rid of texture edges...but I haven’t found it yet.
I am not sure exactly the problem you are having so I am going to give you a couple thoughts.
Hopefully one gives you the info you are looking for.

If you are having problems with the edges of tiled textures then this is something you need to fix in a program like Photoshop.
If you need help learning how to do this, just do a web search for making a tileable texture.

If you have two(or more) different textures that you want to blend between on a surface you can use a Ramp Texture (not Ramp Shader).
Just assign the Ramp Textue as the Color for your Shader and then map your textures to the Ramp.
Change the Ramp Interpolation and Type to help get the look you are going for.

If I totally missed what you are looking for help with, don’t hesite to post.
All the best.
~Ben