Stranger Things Diorama: How to Build the Upside Down

The Upside Down is one of the most visually distinctive settings in modern fiction — dark, suffocating, covered in organic matter, filled with drifting particles of ash and spores. Translating it into a diorama requires specific techniques that differ significantly from standard terrain work.

The Colour Palette

Before building anything, commit to the palette. The Upside Down is dominated by:

• Deep desaturated purples and blue-blacks for the sky and atmosphere
• Dark grey-brown for the ground, with traces of the real-world environment showing through distorted
• Dark red-black for the vines and organic tissue
• Bioluminescent accents — pale blue-green, which appear in creature and gate lighting
• Floating white/grey particles — the drifting "snow" that falls constantly

Critically: everything is desaturated and dark. Any colour that appears bright in the real world becomes muddy and suppressed in the Upside Down.

Building the Ground

The Upside Down ground is a corrupted mirror of the real world — recognisable structures exist but are overgrown and rotted. Build in layers:

1. Base layer: MDF or XPS foam, shaped to incorporate floor or terrain elements from the scene's real-world counterpart
2. Organic layer: apply Vallejo Dark Earth texture paste overall, pressing in rough texture while wet
3. Root/vine layer: press thin wire armatures (22–24 gauge wire, twisted for thickness) into the wet texture paste before it cures, then build up around them with Green Stuff or air-dry clay

The Vines and Organic Tissue

The Upside Down's vines are its most recognisable element. Three approaches:

• Wire + epoxy putty: twist multiple strands of fine wire together, embed in the terrain, then build up texture with Green Stuff. Most controllable, paintable
• Foam rubber threads: foam rubber from a sponge, teased into strands with tweezers and glued with PVA. Holds paint well, very organic-looking
• 3D printed vine networks: design or download vine/root structures for your resin or FDM printer. Best for dense, complex networks in background areas

Paint all vines with a very dark red-brown base (Vallejo Cavalry Brown + Black 1:1), then a minimal drybrush of dark red-ochre on raised edges only. The overall result should be very dark with just a hint of colour.

Creating the Floating Particles

The drifting "snow" is what makes the Upside Down feel alive and genuinely eerie in a diorama. Techniques:

• Stretched fishing line with PVA dots: string fine monofilament fishing line between fixed points, apply tiny dots of white PVA with a toothpick at irregular intervals, allow to dry
• Fine glass or plastic balls: seed the scene with tiny glass microbeads (available from art suppliers) — gravity causes them to settle on horizontal surfaces naturally
• White flock specks: static grass applicator loaded with white flock, held above the scene, creates a random particle distribution pattern
• Resin encapsulation: cast the entire scene in water-clear resin with white microbeads pre-mixed — particles suspended forever in mid-fall. Advanced technique but spectacular result

The Gate (If Including)

The Gate is a defining Upside Down element. Build as a vertical panel of XPS foam, carved with a central tear. Line the tear edges with wire armatures and Green Stuff organic tendrils. Backlight with red-orange LEDs — the glow through the tear is the centrepiece of the scene. Paint surrounding foam with dark iridescent colours (Vallejo Shifter paints or interference acrylics).

Lighting: Essential for This Scene

The Upside Down demands embedded LED lighting to work as a diorama:

• Cold blue-white for the general atmosphere (pre-wired 3mm LEDs at the base, lighting the scene from below)
• Red-orange for the Gate or any Demogorgon bioluminescence
• A single flickering LED (candle-effect LEDs work perfectly) if including any "Christmas lights" element from the show