I have been using SD for a long time so this isnt a begineer question, for this example I've used a blender square to explain my question.
If you look at the image you will see what Im looking for, ideally a node, which will apply dirt, lower to the ground= more dirt, higher from the ground=less dirt. I assume some sort of position map/world space normal thing would be necessary, however I can't find a node which quite does it.
the dirt gradient sort of sums up the type of image I'd like to see on each face, however I would also like the textures to be seamless, so I assume I should also use a triplanular node?
any advice would be welcome.