There have been some experiments along these lines for "hat" tilings: https://conwaylife.com/forums/viewtopic.php?p=161571#p161571 As far as I know, HatLife

There have been some experiments along these lines for "hat" tilings: https://conwaylife.com/forums/viewtopic.php?p=161571#p161571 As far as I know, HatLife hasn't been adjusted to make SpectreLife yet, but it's probably only a matter of time!