Here's a neck-up deck-up for you. 17 unchanged, 25 altered. Check the "unchanged" image if there's a particular one you'd miss, or you can read the list if you like that sort of thing:

1 Migration: Embellished. Added forehead bird. 
2 Squidilection: Embellished. 1 of 2 tentacled-eye tattooes. This version has an abstract eldritch ripple pattern painted by me. The other one has a neck addition. 
3 Strongarm Syndicate. Now is one of three Infernal Script tattooes, one for each subrace. This one says Child of Mephistopheles across the neck. Looks glowy if you choose a bright color.
4 Hollow Spaces. Now a Bhaal skull with the classic teardrops.
5 Buggish Curls: Unchanged.
6 Shriek Mask is now a Tentacle Mask. 
7 Starpoint Glimmer: Embellished; forehead star elaborated.
8 Nightjar Blots. Unchanged.
9 Spiderlip. With added webs and small arachnid shape.
10 Fiendhorn Lids: Unchanged.
11 Flaring Sword. Now a flamberge, more understated and ornate but similarly placed.
12 Switchback Trail has been embellished. 
13 Woven Razors: Unchanged.
14 Caldera is now a forehead wolf symbol.
15 Sinner Cheekbone now flirts with Asmodeus. Looks a bit glowy if you choose a bright color.
16 Splashing Tailfin is now seriously aquatic in theme. Another abstract pattern painted by me.
17 Fallen Leaves, now an elegant tree design with elvish scripts. 
18 Pouring Hate: Unchanged.
19 Fungal Cloud: Unchanged.
20 Cursed Rose: Embellished. A rose covered figure added; the original is unchanged. 
21 Scrawled Constellation has been changed to Draconic script intermittently placed down the center of the face: Honor, Pride, Tradition, Clan. 
22 Yggdrasil: Unchanged. 
23 Totemic Throat: Unchanged.
24 Dolmen Cross: Unchanged.
25 Suffusion: Unchanged. 
26 Faewild Syndicate: Unchanged.
27 From the Deep. Full flame frame, left and right.
28 Beholder Gorgon: Unchanged.
29 Chastened. Says "Property of Zariel." 
30 Blake Tiger is now a full face Dread Fog.
31 Sharp Candelabra always looked like a dwarven tree motif to me, so I made it one. Perfect for a druid. And yes, that DOES say "BY MORADIN'S HAMMER!"
32 Polkadots. Tentacle eyes from Squidilection, plus an eldritch neck tattoo of Mantorok being bound by its mortal enemy, servant to another ancient one. Yup, that's a subtle reference, and looks enough like a lich with a tentacle god behind him to fit into D&D as well. 
33 Wicked Reaper is now an ornate and elegant mask.
34 Brokenshard Sword: Embellished. Now a flamberge, same spot.
35 Guerilla. Nordic face mask with rear head tattoo. Almost like having three creepy faces instead of one. 
36 War Boars. Now an exotic skull mask.
37 Masque of Wrath: Unchanged.
38 Ivy Trellis: Unchanged. 
39 Searching Chains: Unchanged. 
40 Mechanus Moons: Unchanged.
41 Centipedes, combined with Macabre Chinstrap.
42 Mud Worms: Now an absolutely adorable white (IRL) moth. It's called the Venezuelan Poodle m--I mean, it's uh, the Faerunian Fluff moth. Yeah.
43 Macabre Chinstrap: Now a Selunite or nature Tattoo with crescent moon lips, Starpoint Glimmer's eye paint, and a forehead star plus crescent. 
44 Dread Fog. Unchanged.

To install, just unzip to merge the Generated folders in your BG3 directory or plonk the file down in your Resources folder; same as any tattoo mod.

To uninstall, just delete the file or replace with another tattoo mod. 

If someone makes a Unique Tav version, I'd be glad to upload it, but I'd need some ELI5ing to be able to make one myself.

If you want to include a few of my tattooes in your own mod, feel free to use them as long as you credit me and link the mod.