Hmm, I agree to this point, I thought already in the framework of tes4ll to have something in hand which makes a realistic and coherent generation of landscapes, including normal maps, vertex color and meshes, such that e.g. valleys have more darkness, and to add proper shading of the mountains. But at the moment this is fantasy.
For TESAnnwyn I know that it can re-import the vertex painting. Did I understood correctly, that you need a tool which takes this maps, and modify it according to the geometry of your landscape?
Same with the texture map? Like having a default that certain slopes/heights should get a default texture?