Behind the Render: Building the 9.45Industries Q.A.P.X. CORDURA Concealment Bag in 3D
Every product tells a story, but tactical gear needs to tell it instantly. That was the challenge 9.45Industries brought to us at Cleverpoly Studio. They wanted a 3D explainer animation for their Q.A.P.X. CORDURA Concealment Bag, A discreet everyday carry bag engineered to securely hide and instantly deploy a sidearm.
The mechanism behind the bag is simple in theory, but a genuinely clever piece of real world engineering: you pull a single quick release tab on the corner, and both zippers instantly split open on either side. The bag falls open, immediately revealing a holster with the firearm locked in and ready to grab for an emergency situation.
9.45Industries wanted this shown as cleanly and clearly as possible. No human hands in the frame obscuring the view, no shaky live action camera work just a slow, focused, hyper clean animation that lets you actually see how the mechanics function, paired with a full gallery of high resolution product stills for their site.
We built the whole thing in Blender, and it was one of the more technical projects we've done mostlybecause the fabric that opens itself in sync with hardware isn't really something 3D software does out of the box. Here's how we got there.
The Challenges
1. Getting the model to actually look right
The first thing was simple: the bag had to look identical to the physical product. Not just close enough and not it reads fine from far away it had to be dead on.
Tactical gear like this lives or dies on small details: the weave of the Cordura fabric, how thick the stitching looks, the matte finish on the buckles. If any of that felt slightly off, the whole thing would look like a toy instead of real gear.
There's no built-in "zipper" tool for this, so it came down to rigging it by hand getting the sliders to follow the curve of the bag opening while the teeth behind them looked
like they were actually parting. It took a lot of trial and error to get it looking clean from every angle the client wanted to use, since a rig that looked fine from one side would fall apart from another.
We didn't jump straight into the fine details, either. We started by blocking out a rough model to lock down the core shape, proportions, and silhouette first. Once we sent that to the client and got their sign off on the overall geometry, we spent about a week building up the details layer by layer - adding the Cordura textures, zipper tracks,
webbing straps, and rubberized guards until it matched the real bag completely.
2. Making the simulation and the zipper work
This was the big one. Once the tab is pulled, everything needs to react together: the fabric corners peel back, both zippers travel open at the same time, and the flaps fall open naturally to show the holster inside. That's a rigid mechanical animation and a cloth simulation both happening at once. Everyone knows instinctively what a real zipper looks like when it opens, which makes animating one in 3D unforgiving if the teeth don't separate properly, your eyes spot the fake instantly.
It came down to building a custom rig by hand. We had to force the zipper sliders to follow the specific curves of the bag opening while ensuring the teeth behind them parted cleanly without clipping, stretching, or overlapping. It took a massive amount of trial and error to get it looking clean from every camera angle the client wanted.
We solved it by not trying to do it all at once. First we locked down the zipper animation on its own until the timing was solid. Then we built
the cloth simulation separately and tuned it so the fabric fell open with the right weight.
Getting the fabric to actually behave like CORDURA was a challenge of its own. In Blender, default cloth simulations tend to look like light cotton or thin silk they flap around, wrinkle too easily, and lack weight. But real 1000D CORDURA nylon is thick, stiff, and heavy. it resists bending, holds rigid folds along its stitched seams, and buckles under tension. We spent a ton of time fine tuning the fabric's internal stiffness, bending resistance, and mass damping.
The goal was to make sure that when the quick release tab gets pulled, the bag corners don't just collapse they spring back and fold open with the deliberate, heavy duty snap of real tactical gear.
3. Making the Simulation and the Mechanism Sync
We had to get rigid metal zippers and soft structural fabric to react simultaneously without breaking the illusion. When you pull that corner strap, three separate things happen in a split second the corner buckles under tension, both zipper sliders travel along their tracks, and the main flaps fall open to reveal the holster.
Combining hard surface mechanics with dynamic fabric physics in 3D is always tricky. If the fabric simulation falls even a single frame behind the mechanical movement, you get unnatural stretching, mesh clipping, or hardware detaching from the seams entirely.
To solve this, we isolated the mechanics first, locking down the precise path and speed of the zippers to establish a solid movement baseline. We then rigged the pull tab to a dedicated control to drive realistic surface tension, and pinned the fabric's edges directly to the zipper track. This forced the fabric physics to respond to the mechanical opening frame by frame, turning what could have been a chaotic simulation into one clean, seamless reveal.
What We Ended Up With
A clean, human free animation that shows exactly how the mechanism works,
plus a full gallery of stills covering the bag closed, open, and with
the holster and gun in place.
How We Approach Projects Like This at Cleverpoly Studio
Complex product visualizations live or die on structure. When a client brings us a product with moving parts, internal mechanisms, or specialized materials, we follow a tested workflow to make sure the final result is as functional as it is beautiful:
1. Establish Reference Accurate Foundations Early
When a client knows their product inside and out, the 3D asset has to earn their trust immediately. We build in clear stages blocking out proportions first and securing client approval before investing time in texturing or high-poly detail. This guarantees we never waste time polishing a model that has the wrong dimensions.
2. Isolate and Solve Mechanics Before Simulation
Whether it’s zippers, latches, folding hinges, or mechanical springs, we isolate the rigid moving parts first. By establishing a solid, predictable mechanical animation as our baseline, we eliminate variables early and keep complex sequences from turning into an unmanageable mess.
3. Let Simulation React to the Mechanism, Not the Other Way Around
Dynamic elements like cloth, leather, rubber, or cables should always be driven by the hard surface mechanics. Layering soft body dynamics onto a working mechanical rig ensures that the physics feel natural, organic, and most importantly grounded in real world rules.
4. Leverage 3D for What Live Action Can’t Do
Traditional photography often struggles with small spaces, fast mechanisms, or hands blocking crucial angles. With 3D, we can slow down time, remove physical obstructions, adjust lighting dynamically, and give your customers an intimate, "X-ray" look at why your product actually works.
Got a product with a complex mechanism, hidden features, or engineering that’s hard to capture on a traditional camera?At Cleverpoly Studio, we turn intricate designs into clear, high impact visuals that tell your product's story instantly.
