How To Convert Large Files To 15mm/1-100th Scale For 3D Printing

So, you have a 3D printer (or want to buy one) and want to print and play 15mm Tabletop games.

The problem is, all the cool digital sculptors whose work you like seem to only offer .stl files in 28/32mm, or 1/56th scale if you're exacting when it comes to such matters, like me.

No worries.  You can easily use the slicer software that came with your printer to convert those big ones into little ones.  I happen to use Chitubox, but most slicer programs have similar concepts.

We start by selecting all the 28/32/1-56th scale files we are going to need, and import them on to the slicing plate.

Don't worry if they don't fit.  They soon will.

We select all the files, then click on the Scale command over on the sidebar.  Since these files are originally at 1/56th scale, and I want to go to 1/100th scale, I shrink the large files to 56% of their original size.

Now, they're like shrinky-dinks.

With the files all still selected, we use the Auto Arrange command to gather the scattered, smaller parts on the center of the slicing platform.

I de-select all the mass of files, and start moving things around to how orient things are normally oriented.  I prefer to put taller, more mass-intensive objects in the center of the build plate, with smaller stuff on the peripheral edges.  This is more art than science, and everyone has their own personal methodology.

Here's the reverse angle of the shrunk and re-arranged build plate.

The conversion process doesn't just open new opportunities to the models you can use, but it also saves a lot of material.

By shrinking things to 56% of their height, you actually use only 17.5% of the volume in resin, thanks to the square-cube law.

Thus, that giant 28/32mm model that usually takes 1000ml of resin to print, once shrunk to 56% of original size, only takes 175ml to print.  You can print 5 to 1, with resin to spare.

Here's a drum magazine for a 1/56th scale mech.  15.35ml of resin, including all supports.

After shrinking it to 56% of original size, we get 2.7ml of resin.  That's a lot of savings.

So, envy the big stuff folks no longer, 15mm aficionados.  Converting their stuff for your own use is only a few clicks away.

Enjoy!

Best,

John Bear Ross

  

Renegar Superheavy Tank

  Big Tank Day!

Use code TWENTY2026 at checkout, or join my Patreon (patreon.com/johnbearross) or Tribes for even larger discounts.

Not all worlds and realms trust or can afford mechs and other titanic walkers, relying instead on thick armor and a low profile to deliver death to the enemy.

The High Thirdgate Folk, or Insos, as they call themselves, especially those from mining worlds like Bertini, Lyre, and StartDiggin, have shunned titans and mecha in favor of solidly-built tanks, and offer a base variant of the Renegar that is widely used throughout the Worldgate networks. When they can fit through the portals, of course.

The 4th Proud and Strong, The Red 9th Of The Long Dirge, and The Grandhammer Legions of the Insos are especially fond of these massive vehicles that can bowl over titans and keep going.

The Renegar Superheavy Tank, named for an intrepid inter-realm explorer and pioneer from the Insos homeworlds, is a stalwart, dependable machine, simple in construction, and horrific in its damage-dealing potential.

The Renegar Superheavy Tank (Base Model)

Cults3D.com

https://cults3d.com/en/3d-model/game/renegar-superheavy-tank-base-model-28mm-1-56th-scale

MyMiniFactory.com

https://www.myminifactory.com/object/3d-print-renegar-superheavy-tank-base-model-28mm-1-56th-scale-776168

Superheavy Tank Upgrade Turrets

Cults3d.com

https://cults3d.com/en/3d-model/game/superheavy-tank-upgrade-turrets

MyMiniFactory.com

https://www.myminifactory.com/object/3d-print-superheavy-tank-upgrade-turrets-776203

The Full Superheavy

Cults3d.com

https://cults3d.com/en/3d-model/game/the-full-superheavy-all-superheavy-armor-hulls-weapons-etc-forever

MyMiniFactory.com

https://www.myminifactory.com/object/3d-print-776194

What does this have to do with 15mm/1-100th Scale?
These files are easily downsized in your Slicer program by scaling them to 56% of original, even pre-supported.  You use 1/6th the amount of resin, and can still have a megatank that fills your entire hand with no loss of detail.

Enjoy!

15mm (1/100th Scale) Project KampfHund Light Battle Titan

 

Launch Day for the 1/100th (15mm) Project KampfHund Light Main Battle Titan

Free PDF Instructions for the 15mm/1-100th scale KampfHund (the 28mm version, too) for evaluation.

https://we.tl/t-qaPiAQ9ETo

Use LOWKEY20 at checkout or join my Patreon ( www.patreon.com/johnbearross ) or Tribes on MMF to get a rolling 50% discount code, along with a few other bennies.

3DCults

https://cults3d.com/en/3d-model/game/15mm-1-100th-scale-project-kampfhund-light-main-battle-titan

MMF

https://www.myminifactory.com/object/3d-print-15mm-1-100th-scale-project-kampfhund-light-main-battle-titan-709351

 

15mm (1/100th Scale) CAT Commanders

 

The Cybernetic Automated Troopers, or CATS, are hulking combat cyborgs. However, despite their fearsome firepower, they require guidance and coordination. That is where the CAT Commander comes in to play.

Sometimes referred to in jest as the "CAT Daddy" or "Herder of CATs," the CAT Commander is (usually) a standard human wearing an older style of Hard-Ex powered armor which is enhanced with command and control modifications, including comm antennae and targeting sensors. A heavy grenade pistol is their standard sidearm.

If you're a Patreon member, be sure to use your codes.

If you're not, a $1.99 membership gets you a 50% discount on your entire month's purchases.

Here's the links...

15mm CAT Commanders

https://cults3d.com/en/3d-model/game/cat-commanders-15mm-1-100th-scale-armored-command-figures

https://www.myminifactory.com/object/3d-print-15mm-cat-commanders-power-armored-command-figures-523034

The AA batteries are shown as size reference for the 28mm versions, but are meant to show the variety of poses.

The painted printouts are based on US Penny coins, which are about 19mm in diameter.

Enjoy!

Best,

JBR

New 15mm Ion Age vehicles

 Wheeled Gremlins four new 15mm Ion Age vehicles

“We reached the Star Port and I have never seen such a sight before and hope never to again.  It had been a damn hard fight to push the Styx Legion out of the Northern Sector and it had cost us dear.  Over six hundred killed and wounded but had it not been for the moth rotary cannons on our Gremlin AFV’s it would have been much higher. The rubbacrete pads were intact but strewn with bodies, so many bodies; not all of them intact.  The Legionaries do not provision the Maligs so they tend to their own needs.  Vermin.  We sought them out and took our vengeance for those civilians.  It seemed the enemy plan had been to bring a Dragonship down on the main pad. We aimed to stop that.” Captain Abraham Tull, 48th Planetary Defence Regiment, Northern Sector.  4346 IC.

Read the full article on our BLOG including a free rules download for Callsign Taranis for use of these and other vehicles in Patrol Angis.

Thanks for your time.

Spring Mega Event 2025 at Alternative Armies

Spring Mega Event 2025 is on until 6th May.  So much new (50 codes in 28mm,15mm and 6mm), a massive blanket auto discount (20%), free miniature in packages (Warbot III until 24th April) and more. Sci-fi, Fantasy, Historical new.  Big, big article details it all.

See the website for our 15mm Science Fiction Ranges.  HOF, Ion Age, Laserburn, Asgard, Bradley, Loud Ninga Games, SHM and more!