Tag Archive | Miniature Terrain

DIY Miniature Terrain: Glowing Pillars

Pillars are a common feature in many dungeons and ruins, and magical pillars can provide an interesting terrain feature for encounters.  I’ll show you how with a few supplies from your local craft store you can make great looking glowing pillars to enhance your next game.

To make four glowing blue pillars, you will need the following, all of which can be found at Michael’s craft stores:


  1. Fillable Pillar Set
    These are the core of the project.  The columns themselves are almost exactly 1″ by 1″, which is perfect for D&D, though the top and base are larger (around 2″).  Fortunately, they can be removed.  The pillars come in 4″ and 6″ tall (I chose the 4″ for my purposes).
  2. Ashland Blue Submersible LED Lights 4 pack
    To make the pillar glow, we need a light source, and these bright blue LEDs do the job nicely.  Of course, if you want something other than blue pillars, look for another color LED instead.  You’ll need lights that are no wider than ~1″ in diameter, and no taller than 3/4″.
  3. Liquid Water Gems, Blue
    The trickiest part of this build was figuring out a way to get the column to actually “glow”.  The LED needs something to illuminate otherwise it will just look like a clear plastic column with a light at the bottom.  That’s where these water gems come in.  These little spheres are made of a polymer that absorbs water, and will scatter the light we shine through them.  Getting them in the same color as the LED enhances the overall effect.

Additional supplies you will need include:

  • Plastic wrap (e.g. Saran Wrap)
  • Electrical tape
  • Four dimes
  • Water
  • Scissors

Build Instructions

  1. LED, Disassembled

    The submersible LEDs that we bought are too big to fit into the pillars as they are.  Fortunately, they are easily taken apart.  Simply grab a hold of the clear plastic top with one hand and the colored plastic bottom with the other, and twist the top counterclockwise.  With some luck, it will unscrew, allowing you access to the LED light resting in the bottom piece.  The light is part of a smaller plastic piece that also holds the batteries.  Remove this whole piece (light and batteries, which I will call the “assembly” for easy reference), and put the plastic top and bottom aside (they won’t be used).
  2. Fillable Pillar, Disassembled

    Take a plastic pillar and remove the top and bottom pieces.  Notice that inside the pillar there are actually two cavities (it isn’t hollow completely through):  a large area, and a small one.  The small one is going to house our light.

  4. Electrical Tape To Hide LED

    Take the LED and battery assembly you removed from the submersible light housing and set it in the small section of the pillar so that the light points toward the larger section.  You’ll probably want to put the batteries aside for now, if they haven’t already fallen out.  It will be a tight fit, so you’ll probably need to set the pillar on a hard surface with the bottom of the light down and give it a good push from the top to get it in completely.  Push firmly enough to get it in place, but don’t be too forceful or the plastic pillar may crack (no matter what you do, it will probably show some signs of fatiguing at the base).
  5. You can hide the light in the bottom by wrapping a length of electrical tape about 4″ long around the based of the pillar.
  6. Batteries And Dime In Pillar. Note the metal wire. Dime shown here on top of batteries.

    Place the two batteries (CR2032) into the LED assembly such that the plus sign is facing away from the light.  The original enclosure had a metal piece that was used to complete the circuit in the light by connecting the batteries to a small piece of metal sticking out of the bottom of the assembly.  Because we’ve removed this piece, we need something else to close the circuit.  My quick fix was to put a dime underneath the batteries to ensure a good connection.  You may need to fiddle with the wire just a bit to make everything fit (but don’t bend it too much as it may break)
  7. Taped In Place

    To keep everything in place, wrap a 1 & 1/2″ piece of electrical tape across the bottom of the pillar.  At this point, the LED should be lighting up.  If it doesn’t, make sure your batteries are in correctly and the metal piece at the base of the assembly is making good contact.  You may find that the contact isn’t good unless you stand the pillar upright, which is fine.

  9. Water Gems

    In order to disperse the light from the LED, we now fill the large cavity in the plastic pillar with the Liquid Water Gems.  You may find a spoon is helpful here.  Take your time, these little spheres are slippery and have a habit of escaping and bouncing their way to freedom.  Fill the pillar to the top with water gems.

  11. To give the illusion that the pillar is mostly solid, slowly fill the pillar with water to about an inch from the top.  Because of the properties of the water gems, they will appear to mostly disappear as they are covered in water.

    Comparison of Gems (Left) and Gems With Water (Right)

  12. Plastic Wrap Seal

    Cut a small piece of plastic wrap about 2″ square.  Cover the top of the pillar with it so that it is even, wrapping it along the sides so it is flush.

  14. Sealed In Place

    Finally, take one of the plastic caps of the pillar and slowly slide it over the top of the pillar, pulling the plastic wrap taught and sealing it.  (Note:  Although this will form a seal good enough to keep the water and gems from spilling everywhere, it’s not exactly water-tight.  I don’t recommend resting these pillars on their side.)  I left the bottom caps off of mine in order to fit nicely on a 1″ square grid (the bases being more like 2″).
  15. To turn the pillar light off, simply remove the tape from the bottom and take out the batteries.

Terrain Power

What’s a neat looking bit of 3D terrain without some crunch to back it up?  Here’s an example of a fantastic terrain and terrain power that you can use in your game to go along with the glowing pillar:

Necrotic Crystal Pillar

Crystal pillars often resonate with power, sometimes enhancing what is already present in the environment, other times specifically attuned through ritual or magic to a particular energy. These crystals pulse with necrotic energy fueled by the Shadowfell and focused by unholy rites, imbuing those bathed in its light with the withering power of the dead and dampening the power of the divine.

    Effect: All evil creatures within 20 squares of a pillar (or for sake of simplicity, within the same encounter area) gain +5 necrotic damage and resist 5 radiant damage. The effects of multiple pillars do not stack, but DMs could place several pillars in an area to challenge PCs to destroy them all to eliminate the effect. Any time necrotic damage is done as a result of this effect (or radiant damage resisted) a player can make an Insight Check (+2 if trained in Arcana) at a moderate DC for the encounter level as a free action to recognize the effect is coming from the pillars. Similarly, a player can actively study a pillar with an Arcana Check at a moderate DC to reach the same conclusion.
    Usage: PCs can destroy a pillar to cancel the effect as well as shower their enemies in crystal shards (see Shard Explosion below). Crystal Pillars have the following stats:
    HP: 15  AC: 4  REF: 12  FORT: 4  WILL:
    Immune: poison, psychic
    Resist 10: acid, cold, fire, lightning, necrotic, radiant
    Vulnerable: 5 force, 5 thunder

Single-Use TerrainShard Explosion

The crystal pillar explodes in a shower of shards.


Requirement: A Crystal Pillar is destroyed.

Target: Each creature in close blast 2 (centered on pillar)

Attack: Encounter Level +3 vs. Reflex

Hit: Consult “Damage By Level” table for Two or More Targets for encounter level
Miss: Half damage.

Effect: The blast becomes an area of difficult terrain.