Stylized Triplanar Shader for use with Terrain

Hey,

I'm really struggling with this one, I'm a junior programmer and trying desperately to figure it out as it will improve our efficiency no end, but I'm having no joy so far!

I essentially want to be able to use the shader below with Unity terrain whilst maintaining the splat map texture painting functionality.

Is this even possible, has anyone achieved anything like this already?

Any help would be greatly appreciated!

 

There are plenty of triplanar shaders for terrain out there. The main issue is most triplanar terrain shaders don't have a separate top and side texture, though that's completely possible to do. The biggest issue might be running out of texture samplers.