Why Majenta is increasing its 3D and 4D capacity (and it’s not about better renders)
On custodial construction projects, 3D and 4D models aren’t just pretty visual add-ons: they’re the interface where security-critical mistakes get caught before they hit a live site. With the UK’s current prison building programme five years behind schedule, and £4.2bn over budget according to the National Audit Office, this technology is needed now more than ever. That’s one reason we’re scaling up our 3D and 4D teams.
Why 3D and 4D modelling matter more than "a nice render"
Across much of the industry, when you ask what 3D and 4D visualisation bring to a project, you’ll get some variation on “It looks good”. Clients like it. It adds to a bid. It shows off a design. These are all valid reasons to use visualisations, but not a reason we’re adding so much capacity right now.
On technically complex builds, live operational sites and high-security projects, even minor mistakes carry significantly more weight than in general construction. And our team has seen this firsthand.
- A precast panel poured with the service riser hole 15mm out of place, discovered at delivery with nowhere to put it.
- A security camera at a key access point that turned out to have its sightline blocked by a duct nobody noticed.
- A perimeter fence scheduled to be taken down days before the new one would be fully installed and secure.
If you catch these in a 3D or 4D model, most of the time, the fix is trivial, but if they go unnoticed until they turn up on site, it’s more serious. The best-case scenario is disruption to a multi-million-pound project. The worst is hidden safety or security issues making it through handover and into operational use.
Where does added 3D and 4D capacity make a difference?
Scaling up our 3D and 4D teams means we can put more eyes on the projects that matter. And these aren’t just software experts: they’re experienced sector professionals who’ve worked on multiple high-value projects, embedded within contractor teams, and understand the on-site reality that a model represents. Here’s what that looks like on a custodial or prison project:
On the 3D side:
- Clash-checking ligature-resistant service risers against precast cast-in sleeves before the panels are poured.
- Verifying CCTV sightlines against as-built duct and column positions before camera brackets are ordered.
- Checking security-rated door set fixings against offsite module tolerances so a frame isn't out on delivery day.
- Coordinating anti-ligature glazing dimensions against panel openings before the factory and the glazing supplier are working from two different numbers.
- Swept-path modelling the sally port so the gatehouse's single-gate interlock genuinely works for the vehicles using it.
On the 4D side:
- Sequencing the temporary-to-permanent fence line day by day so there's provably never a gap in the perimeter.
- Linking offsite delivery schedules to crane availability and prison operational hours so lifts never land during a headcount.
- Scheduling security system commissioning zone by zone so a wing is never handed over built but not yet secure.
- Mapping badge access zones so a construction workforce's footprint visibly shrinks inward as the build progresses, never overlapping a live prisoner area.
How do 3D and 4D models change project outcomes?
The short answer: it lets you spot more issues before they can snowball. The examples above don’t show up in a flythrough video or in a cursory read of technical drawings. They show up in what doesn't happen: the panel that isn't scrapped, the camera that isn't reordered, the day the perimeter is never open. 3D and 4D models, combined with qualified professionals to interrogate and interpret them, stop these issues while the fix still fits into the schedule (and the budget).
That's the level of detail this sector actually needs, and it's why we're scaling our 3D and 4D team to work on it now, while most of the market still treats this as an optional extra. We've written up the full case in a short paper, Everything locked down except the plan?
Talk to Majenta if the challenges above are relevant to one of your current or planned projects.
