The Vettlingr Tileset uses 32x32 dimensions and aims to add a slight dystopic feel to your fortress; a darkest dungeon inspired style to convey a murkier atmosphere to anyones fort.

Easy install:
Download this tileset
Download or find your LNP directory
extract the contents of this tileset into LNP/graphics
Start your LNP launcher
Update your graphics settings to Vettlingr in the launcher
Alternatively remove the Temp folder inside the LNP
- Play!

Complicated install:
Download Dwarf Fortress
Download and install DFhack
Download and install TWBT into your DFhack version
Set print mode to TWBT
Download and install Vettlingr tileset by moving the files into their correct directory (art to art raw to raw etc.)
- Play!

Changelog
1.6-1: Copper, Bronze, Iron. Touched up rough gems, barrels, glass. Furnaces now show the material they are made of.
1.6: Porcelain, earthenware, paved roads, wood, metal, animation, workshops, creatures and everything has been updated!!
1.5: Added grass, stone, geology, soil, porcelain floor and glass furniture graphics,
1.4a: fix for 47.05
1.3-1b: Added support for 47.04, c: 28/3 fixed some stability issues.
1.3-1: Added domestic and Mountain creature sprites
1.3: Version is Stable. Added more gems and geology sprites, gem walls and loads more.
1.3-a4: Removed Animation :'( Perhaps this fixes the Crash on startup issue when loading TWBT. If not, It may return.
1.3-a3: Added more graphics for gems and other minerals.
1.3-a2: Done some fixes to reduce crash on startup. Hopefully it works now. But I promise nothing.
1.3a: Overhauled Geology Graphics. added Pedestals
1.2-2: Added graphics for underground plants, minerals and alternating floor tiles.
1.2-1: Fixed more bugs, fixed WoodenNSWwall, added unique sprites for:Bars, indoor crops, indoor trees, several items and much much more.
1.2: Added Further furniture variations, as well as new sprites for nestboxes, gems, boulders and instruments
1.1: Added Furniture Variations, updated floors, statues, fixed bug with glass walls.
1.0b: Fixed Tables
1.0: added graphics for all workshops, furniture and some items. Added Specific graphics for metal, wood and glass walls. And much much more.
0.2a: added a few workshop and tool sprites, barrels, large pots, vermin.
0.1a: Added among others, sprites for Hives, wells, Tracks, Trees and Water.