I'm working on updating MoreFloors to RimWorld 1.3. If you're already playing the beta, it looks like it's safe to use the current version of MoreFloors even though it's marked as being out of date.

I'll be updating this with the planned changelog of the update as it happens. So far things I can mention are:

Improvements
* All of the stone floor textures will be redrawn with standardised settings to be consistent with each other and, importantly, the vanilla RimWorld style. This will include creating my own versions of any textures that were previously just fixed-up graphics I'd found from free sources on the net. The old "embossed" effects of highlights and shadows will be replaced with a flatter style as used by RimWorld.

* A non-fine chequered floor will be added that needs just a single stone type, useful if you don't own Royalty and can't build the fine chequered floors it makes available - or if you just want a cheaper way of having that style of floor.

* Slate flooring will match the vanilla RimWorld slate colour. Seems like this didn't get fixed since at least 1.0. Oops :)

Removals (these may affect your existing saves!)
* The eight MoreFloors chequered stone floors that each use two different stone types will be removed.

* Straw matting is included in vanilla 1.3, so the MoreFloors straw flooring will be removed, but it will still be available for use in 1.2 or below.