I think I may have found a bug. After downloading the new Beta 0.98 version, I noticed that photons seems to be acting strange, for example, go to a previous version (0.97 for ex.) and load the save "Artic City 2". You'll notice a PHOT cannon on the bottom right side of the screen, but after the new update, this photon cannon is not working anymore and photons in general appear to be acting different, sometimes it doesn't even go trough GLASS. I can't tell if it's related to the new version or if it's a particular bug from that save, but I recommend checking it out.
Artic City save: https://powdertoy.co.uk/Browse/View.html?ID=159265
Don't know if this is intended, but PROT destroys RSSS.
i cant delete or use filter in lua for some reason