First working version of Terrain-Mesh blending shader Removed 4splat and 8splat specialized legacy terrain shaders; now using a single one Refactored parts of terrain rendering code to make it easier to converge terrain shaders in the future Excluded forward render path in all terrain related shaders Switched legacy terrain splat control maps to linear sampling Added terrain-mesh blend test scene and some temporary assets Fixed Color Texture having no effect in legacy terrain shader (@Petur)