I’m talking about “landscape material layers touching a block” not “number of samplers.” They are of course somewhat related – if you have diffuse and normal samplers, that’s two samplers per layer, and then you need to sample the splat map itself, which gives you 7 samplers for three layers. This might in turn indicate that getting away with a single sampler per layer could help significantly!
Looks like they lifted the three-layer limit, presumbably by doing splatting/overdraw, though!
Mobile landscapes are no longer limited to just three Landscape layers. While three is still an optimized case, any number of layers are supported provided there are sufficient Texture Samplers.
Which is a nice win!