We Were Here Tomorrow Crystal Puzzle: Which Three

Each correct crystal carries a species name and an effect name, and the effect name is what the receiver checks. Pingosius Crystalis is the Mirror or Piercing specimen and goes first. Rupium is Serene or Stabilizing and goes second. Cattonimus is Fiery or Heating and goes last.

The paired wording exists because the game labels the same specimen in two ways, so do not assume you are looking at a different crystal when the panel says "Piercing" and your partner says "Mirror". Agree on one word per specimen at the start and stay with it for the whole room.

Colour is the least reliable identifier in this puzzle. Two specimens can read as the same shade under the room lighting, and the one you want is separated by shape rather than tint.

Pingosso Crystallo is the near-miss for Pingosius Crystalis, and the difference is the small round growths on the upper part of the crystal. Pingosius Crystalis carries extra circular growths near the top; Pingosso Crystallo arranges its small growths differently, which is why a quick glance is not enough.

Cattonimo and Cattonium are listed as confusable names in the same public route, and no source we have gives their effects. Treat both as unconfirmed: if you install one and the receiver rejects the setup, you have probably picked a lookalike rather than made a sequencing error.

The practical method is to describe the specimen out loud before installing it. "Round bumps on the top third, tall spike on the left" is a description your partner can check; "the blue one" is not.

Start with the specimen you installed last, because a failed input usually resets the panel and leaves the error on screen. Confirm it is Pingosius Crystalis and not Pingosso Crystallo. Then confirm the other two are Rupium and Cattonimus by name, not by colour.

Next, confirm the order is Mirror or Piercing, then Serene or Stabilizing, then Fiery or Heating. After that, confirm the route passes the yellow room before the turquoise one, since a correct crystal set with a reversed route still fails.

Finally, confirm the beam path is complete. A missing green segment or the partly hidden triangular component behind the machinery produces the same error message as a wrong crystal, which is why so many pairs swap good specimens for bad ones.

The crystal phase is the second half of the Optics Lab, so the two searches overlap but the questions do not. The laser page answers "how do I get the beam there", and this page answers "which specimen is which". Splitting them keeps each page usable while you are standing in the room.

If you are stuck before the crystals, including the warm-up beam chain and the reflector layout, start with the laser page. If your beam arrives and is rejected, you are already in the right place.

The optical page covers the room names and the reverse-trace method, which is the fastest general technique for the whole area. Read it once before you enter the lab if you have never done a beam puzzle in this series.

Use the three pages in the order you hit the problems. Beam not arriving means the optical page, beam arriving and refused means this page, and an unfamiliar specimen name means this page too. The laser page is the one to read before the room rather than during it.

Player A owns the rack and the specimens, and Player B owns the receiver view. A reads the species name and describes the shape; B confirms what the receiver says after each install. Swap roles only between attempts, never mid-sequence.

Keep the rack tidy in a way you can describe. Move rejected specimens to one side of the bench and confirmed ones to the other, so "the second one from the door" means the same thing to both of you.

If your partner insists the specimen is correct and the receiver keeps refusing, stop and re-read the route order. The error message covers both causes, so check the room order before swapping a specimen that was already right.

You cannot point at a crystal through a wall, so build a small vocabulary before you need it. Height and taper, the number of spikes, whether the growths cluster at the top or spread down the sides, and whether the base is wide or narrow cover almost every specimen in the room.

Round growths on the upper third are the distinguishing feature of Pingosius Crystalis. Say "round bumps near the tip" and your partner can confirm or reject it in one sentence; say "the spiky one" and you will both walk to different racks.

If colour is doing the work in your callouts, replace it. Two specimens read as the same shade under the room lighting, and colour-blind players have a harder time still. Shape and position are stable, colour is not.

Three names are confirmed as the correct set by the two public routes that cover this room: Pingosius Crystalis, Rupium and Cattonimus. Three more appear only as confusable lookalikes: Pingosso Crystallo, Cattonimo and Cattonium.

Pingosso Crystallo is the documented near-miss and the one that costs pairs the most attempts, because it is visually close and shares the effect wording. Cattonimo and Cattonium are listed as names to avoid, but no source we have describes what they do, so their effects are unconfirmed.

Write the six down if you are playing with a stranger. The rack is small enough that a wrong specimen stays installed until someone names it out loud.