Hey!

Another little weirdness that doesn't block progression or whatever.

In short: Puffers (tech: Hatchery / Puffer Refugium) are required for chemical refining (through tech: advanced gas processing and steam cracking 2). This seems to be because the only way to make Raw Gas is through puffers; advanced gas processing unlocks. The two mentioned puffer tech's require the optimized biome planner science packs, which so far have been fully optional.

Looking through the tech tree, the puffers do seem to be required to make purple tech (methane, ethane etc), untill purple tech unlocks a different path through synthesis gas. I haven't started puffers yet so I don't know how mandatory/useful they will become.

So my question; Is it intended to require the biome packs (at all / at this point in progression)?

And a minor one; looking ahead the puffers techs seem weird. It only seems to be possible to sustain them after Puffer Refugium 2. Before that tech you always get less back (4 = 3,95).