diagonal terrain tool

A user (drdr) on the Steam forum said he would like to see a diagonal slope/pathway on a mountainside. I think this is a terrific idea. Not sure how this could be worked into a rake but it would be a nice modification of the raise/lower or flattening terrain editing tools in creative mode.

The terrain data is stored in grid. I would think that it would be possible to achieve a 45 degree slope. I dont know how difficult this is to achieve with a rake but a sloped flattening tool might make this easier to achieve.