Missing ground textures in Experimental build

There are a few ground textures in experimental build that do not work, does anyone have a quick fix for this?

 

What map are the missing textures in?

 

A map to crawl on and hill 2 so far. Looks to be a dirt texture.

 

If they are custom maps then the missing texture is likely due to a fault in the map itself and nothing to do with the experimental version.

 

Nope they work fine when I revert back, it's definitely and issue with experimental.

 

Try redownloading it, but I don't think there's a fix, besides reverting to the stable build.

 

It is probably what used to be rocky dirt, that no longer is in the game's files IIRC, so hopefully it will be put back in by devs and this can be fixed. The problem for me also appears on cliff 2.0 and advanced island.