FAQ - 3D Printing

Can I 3D print a Revit model without fixing the meshes first?

Sometimes, but not always.
While Revit models contain the design information needed to create a physical model, they are rarely ready for 3D printing straight out of the box. Architectural BIM models often contain overlapping geometry, open surfaces, excessively thin elements, and internal components that can cause printing issues.
At Fixie 3D, we regularly receive Revit files that require preparation before production. Our team reviews geometry, repairs mesh issues, optimises wall thicknesses, and removes unnecessary elements to ensure the final model prints accurately and efficiently.
The good news is that you don't need to become a 3D printing expert. We handle the file preparation process as part of our architectural model making workflow.

What file format is best for sending a masterplan to a 3D printing studio?

The best format depends on your design software, but for most architectural projects we recommend:

  • STL (.stl)

  • OBJ (.obj)

  • 3MF (.3mf)

  • Rhino (.3dm)

  • SketchUp (.skp)

  • Revit exports

For large-scale masterplans, we often prefer receiving the original source file alongside exported geometry. This allows us to optimise the model, separate assemblies, and prepare sections for large-format printing.
If you're unsure, simply send the native design files and our team can advise on the best workflow

Will fine details like window mullions show up on a 1:200 scale architectural model?

Yes, but it depends on the thickness of the detail and the printing technology used.
For high-detail architectural models, SLA resin printing can reproduce extremely fine features that would be difficult or impossible using traditional model-making techniques.
As a general rule, window mullions, façade fins, balcony railings, and other fine details need to meet minimum printable thickness requirements. During file review, we assess whether these elements will reproduce successfully at the intended scale.
For premium client presentation models, we often adjust details slightly to ensure they remain visually readable while preserving the design intent.

Can a 3D printer make a model with hollow spaces or internal rooms visible?

Absolutely.
Modern architectural 3D printing allows us to produce:

  • Section models

  • Cutaway buildings

  • Removable roof systems

  • Internal room layouts

  • Hollow structures

  • Multi-part assemblies

For property developers and architects presenting complex designs, sectional models are particularly effective because they reveal internal circulation, layouts, and spatial relationships that are difficult to communicate through external massing alone.

How much does a professional architectural 3D model cost in the UK?

Architectural model pricing varies depending on:

  • Model size

  • Level of detail

  • Printing technology

  • Material selection

  • Finishing requirements

  • Assembly complexity

Simple concept models may start from a few hundred pounds, while highly detailed presentation models, planning submission models, or large masterplans can range into the thousands.
At Fixie 3D, every project is quoted individually because two models of similar size can have dramatically different production requirements depending on detail level and finishing expectations.
The most accurate way to determine cost is to share your CAD files for review.

Is 3D printing a site model cheaper than hiring a traditional model maker?

In many cases, yes.
Traditional architectural model making often involves extensive manual cutting, assembly, and fabrication. 3D printing automates much of this process, reducing labour and enabling rapid iteration.
For complex geometries, urban masterplans, and highly detailed building models, 3D printing is often significantly more cost-effective than traditional fabrication methods.
Many architecture firms choose a hybrid approach that combines 3D printing with hand-finishing to achieve the best balance of quality and budget.

Does 3D printing price depend on the volume of resin or the hours it takes to print?

Professional pricing is usually based on several factors, including:

  • Material consumption

  • Machine time

  • Labour

  • File preparation

  • Finishing

  • Assembly

  • Packaging

While resin volume and print duration are important, they are only part of the equation.
For example, a model requiring extensive support removal, painting, and assembly may involve more labour than the actual printing process.

How can I optimise my CAD file to lower the 3D printing cost?

There are several ways to reduce production costs:

  • Remove hidden internal geometry

  • Avoid unnecessary detail at small scales

  • Combine repeating elements where possible

  • Use appropriate wall thicknesses

  • Separate large assemblies logically

  • Consider hollowing non-visible volumes

At Fixie 3D, we often identify opportunities to reduce material usage and production time without compromising the appearance of the finished model.

What is the difference between SLA and FDM printing for architectural models?

SLA and FDM serve different purposes.
SLA Printing
Best for:

  • Client presentations

  • Planning submissions

  • Competition entries

  • High-detail building models

Benefits:

  • Extremely smooth surfaces

  • Fine detail reproduction

  • Premium appearance

FDM Printing
Best for:

  • Concept models

  • Early-stage design studies

  • Large-scale prototypes

Benefits:

  • Lower cost

  • Larger build sizes

  • Faster production

For projects where presentation quality matters, SLA remains the preferred choice.

Can you paint SLA resin models to look like concrete or wood finish?

Yes.
Professional finishing can dramatically enhance the appearance of a model.
At Fixie 3D, we regularly apply:

  • Concrete-effect finishes

  • Timber-effect finishes

  • Stone finishes

  • Metallic coatings

  • Colour-coded planning models

Using specialist primers, paints, and finishing techniques, we can create presentation-ready models that communicate material intent and architectural character far more effectively than raw prints.

Do 3D printed architectural models look layer-y or smooth?

This depends on the technology.
Low-cost desktop FDM prints often display visible layer lines.
Professional SLA resin printing produces significantly smoother surfaces with minimal visible stepping.
After sanding, priming, and finishing, most clients cannot identify that the model was produced through additive manufacturing.

Can I get a 3D printed building model mounted on a presentation baseboard?

Absolutely.
Many of our architectural models include:

  • Custom baseboards

  • Project branding

  • Acrylic covers

  • Landscape detailing

  • Road markings

  • Site context elements

A professionally mounted model not only improves presentation quality but also enhances durability during transport and client meetings.

What is the turnaround time for a large-scale architectural 3D print?

Turnaround depends on complexity, size, and finishing requirements.
As a general guide:

  • Small architectural models: 3–7 working days

  • Medium presentation models: 1–2 weeks

  • Large masterplans and exhibition models: 2–4 weeks

Where project deadlines are critical, we can advise on accelerated production options.

How do you ship a fragile 3D printed masterplan model without it breaking?

Professional packaging is essential.
At Fixie 3D, large-scale models are typically:

  • Packed in custom protective crates

  • Secured using foam inserts

  • Shipped in modular sections where appropriate

  • Assembled on-site if required

Our goal is to ensure the model arrives in the same condition it leaves our workshop.

If my design changes next month, do I have to reprint the whole 3D model?

Not necessarily.
One of the biggest advantages of 3D printing is flexibility.
Where possible, we design models using modular assemblies so individual buildings, phases, or components can be updated without replacing the entire model.
This approach is particularly useful for masterplans and phased developments.

Are there 3D printing studios in London that do rush orders for planning submissions?

Yes.
At Fixie 3D, we understand that planning deadlines, client presentations, and competition submissions often move quickly.
Depending on project scope and production capacity, we can accommodate expedited schedules and fast-turnaround architectural model production.
If you're working against a deadline, contact our team as early as possible so we can assess the project requirements and recommend the fastest route to delivery.