Truth is, the current scenario plan doesn't reallly need TotPP 18 to run fine, and I began building it for totPP15. Facing sometimes difficulties with my Cov2ToTpp install, I'm reluctant to abandon one somehow working. personnal bias I guess. Furthermore, well, I have to admit sticking a little to ToTpp15 allows me not to take time gluing gigas of pictures to dl left an right, and concentrate more on the lua part. The MAJOR upgrade envisionned howether needs a feature not implemented yet anyway to feel smooth (changing not only terrains.bmp but also cities.bmp and units.bmp in direct via lua to generate day/night alternance, having some changes using lua). So, my (bad ?) idea was to propose a first working version, which is not yet done, to begin polishing the final one (proposing I hope that major feature), validating or not features, gameplay, balance and events, and add during that time few features allowed by ToTpp18(or more) to prepare the Big future version ?