Lo-Fi Games

I opted into the steam experimental build yesterday. I verified integrity twice, right Alt is not showing ground objects.
I do not know if there is a difference in right and left alt keys, but on my keyboard left alt is broken, and right alt worked with the stable release.
Windows 10 pc.

It is settable in controls options (Highlight items), you are free to put the right alt there or whatever other key to substitute (or in addition to) the default left alt.
On some keyboard the right alt acts just like the left alt, but usually they have different keycodes and a different meaning.

I am aware of that, and rebound it to /, but in the stable release, both alt buttons worked. Something changed that wasn't my keyboard, so I bug reported it.