So. If I had a trait filter (the Zolnixi witch, for example) and I wanted a specific mutation from it, if I used it on a pet with a visibile trait/gene in only one of the possible areas, would that guarantee I'd get that gene? So, if I used a nullification philter on the ones I don't want, I would definitely get the one I want?

if you wanted a specific trait from a Restricted Trait philter, you'd need a pet with at least one visible trait, and all the slots of that Restricted Trait Set that you didn't want filled with carried traits.

We cover it a bit in the "Restricted Trait Disruptors" section of this post, but basically the restricted trait philters remove one visible trait from a pet, and give it one of the traits from whatever set the philter was from at random.
(so a pet who's 6-vis can have any trait replaced, but a pet who is 5-carry with 1-vis in a trait slot that doesn't correlate to the specific set can't use it)

Example:

Our Mystical kelpari has these genetics:
Gene 1: (NC) Frog Spots
Gene 2: (NF) Sunspots
Gene 3: (NA) Glowing Runes
Mutation 1: (CE) Nightmare Spikes
Mutation 2: (AD) Splash Wings
Mutation 3: (NH) Ornate Helm

If we used one of the reaper philter on her (set uses slots G3/M1/M2/M3) it could only give her either the M1 or M2 of the set.

But if we used one on this boy

Gene 1: (SS) Sweetlips
Gene 2: (NN) Nothing
Gene 3: (NN) Nothing
Mutation 1: (BB) Pearl Armor
Mutation 2: (NN) Nothing
Mutation 3: (CC) Bubbles

it could a) replace either M1 or M2 with the corresponding restricted trait, or b) remove any one of the three traits and give him G3 or M2 instead.

So if you wanted, say... a zolnixi with G2: (HH) Cute Witch Fire specifically, you'd need a nixi that had 1 vis Gene and carries in all Mutation slots. If it had one no-carry mut slot, it'd be a 50/50 as to whether it'd get the gene or the mut that went in that slot.

(also, oh no, so many new restricted philters, I need to update the threadddd)

Seriously? That SUCKS.

But thanks for the info :k