Landscape Layer mask as a texture

Hi, is there a way to access (in a landscape material) a landscape layer blend mask as a texture that can then be sampled at an arbitrary UV coordinate?

This is different from LayerSample because LayerSample returns the color of the associated layer blend mask at the current coordinate being rendered. I need to access the color at a different UV coordinate.

Nope. The only way possible atm is exporting layer mask and re-importing it as an ordinary texture.