Describe the Suggestion

When holding a block in the offhand, and placing rails with the mainhand, you'll automatically lay a rail bed using the offhand block. This is nice, but it also seems to be a little bit dumb about using slabs--it always fills the whole block.

Ideally, when using slabs as rail bedding, half-slabs should be used when there's air beneath the bedding block--saving on materials.

Screenshots and Videos

The left side of this image depicts what this would look like. The right side is bedded with double-slabs.

Additional Context

No response