Change to Mylon's original mod to tone down the path transition to only affect grass tiles and only "wear down" to dirt level, instead of sand. Made mainly for personal use but decided to upload it here for my friends to be able to easily download it.

Original Description:

Running back and forth between parts of your factory and haven't gotten around to paving it yet? Now you'll see results with Dirt Path! Frequently used paths will now change to show their use. May also give you tips on where you need to put down bricks or concrete!

Original Mod: https://mods.factorio.com/mod/Dirt_Path