Here is the Uncharted 2 monastery model in Unity.
I tried to recreate the blend shader with Strumpy Shader Editor. I haven't quite got it yet. I need to work out how to access a single vertex colour channel. It looks like it's using all three and ends up blending too much of the top layer.
I haven't managed to get normal maps working yet either.
I also set up some lights and baked a lightmap. Looks pretty nice I think.