Tileset brush set extension?

Hi all.

I have some texture tiles I've made, and can apply them the way I like with Blender. This takes time though, and I wondered if there was a tool for Unity, where I could use a brush to 'paint' the different textures onto a mesh? Think of the terrain brush in the Warcraft 3 editor. That allows you to paint sand and grass and things, and it does the edge and corner tiles automatically, without needing singular focus and the extra time and coordination that takes.

Perhaps there's something in the asset store? But I couldn't find it with a cursory glance. And I'm not sure I'm using the correct keywords.
Thanks,

givecake

 

Terrain Tile Editor. I have not used it but its description says it uses tilesets like Warcraft 3.
https://www.assetstore.unity3d.com/#/content/3201

Caveat, this extension has not been updated recently. Someone on the forum for this extension expressed concern with 4.3 compatibility.
http://forum.unity3d.com/threads/131862-Terrain-Tile-Editor

 

Thanks Sleepingwalrus

How do you personally apply different textures to a mesh? Paint them on? Doesn't painting always mean there will be a fading edge between different textures? Are there any other ways? hmm..