Best way to texture a terrain in Octane?

[thenomad]

Hiya!

So, this may be an extremely noob question, and apologies if so.

I'm trying to texture a terrain using Octane, which consists of grass and a lot of cliffs. The terrain's generated from a heightmap.

I've got a splatmap (opacity map) for the grass texture, which obviously is best applied from a planar projection (ie top down). However, the cliff texture can't be applied that way or it smears horribly: it needs to either be applied via a different planar projection or a face projection.

All of this is pretty basic stuff, obviously, but I figured it was best to be precise.

So, my question: what's the best way to do this with Octane? I can't find a way to reference vertex colors in Octane, and I believe multiple map channels aren't supported. I want to use an image texture for the cliff if possible.

Is this possible, and if so, what's the best approach?