Is there a way to give highlight and shadow information to textures by painting on terrain? In Blizzcon 2017 - DesignCraft panel (minute 11:17, - YouTube), they talked about Vertex Shader on terrain which they also called it as “coloring with a light to bring highlights and shadows on any texture”. I know that it is the wow engine and they coded a specific tool that does the job but what I want to know is that is there any tool on terrain paint that allows me to do the same style detail painting?
There is another cheesy way where I can combine a darker gray color and the texture, create a separate layer and call it “RockShadow” and such, which works well but this is the long way of doing it.