3D rendering glossary
3D illustration: what it is, how it's made and applications
3D illustration is an image created from three-dimensional models built on a computer, to which materials, light and a virtual camera are applied to produce a final two-dimensional result. It can be photorealistic, like an architectural render, or stylised, like animation characters or editorial illustrations.
How a 3D illustration is created
Although each studio has its own method, the process usually follows these phases:
- Concept and references: sketch, moodboard, plans or photographs that define what you want to convey.
- Modelling: building the geometry in programs such as Blender, 3ds Max, Cinema 4D, Maya or ZBrush (the latter for organic digital sculpting).
- Materials and textures: colour, gloss, roughness and relief are defined for each surface, usually with physically based (PBR) materials.
- Lighting: virtual lights, sun, sky or HDRI maps that set the mood and time of day.
- Framing: the camera, focal length and composition are chosen, just as in photography.
- Render: the engine (V-Ray, Corona, Cycles, Redshift, Octane) calculates the final image.
- Post-production: colour, contrast, atmosphere adjustments and small touch-ups in Photoshop or another editor.
Styles of 3D illustration
| Style | Characteristics | Common use |
|---|---|---|
| Photorealistic | Imitates a real photograph: physical light, reflections, detailed textures | Architecture, property development, product |
| Stylised or cartoon | Simplified shapes, flat or soft colours | Advertising, brands, animation |
| Low poly | Few visible polygons, geometric look | Infographics, video games, web |
| Isometric | View without perspective, with axes at 120 degrees | Infographics, diagrams, apps |
| Clay or white model | Everything in a neutral material, without textures | Volume studies, concept presentations |
Applications of 3D illustration
In architecture, 3D illustration (also called architectural visualisation or architectural render) lets you see a building before it is built. It is used to study volumes, facade materials and natural light, and to present the project to the client or to a competition.
In practice: Render Fabrik is a 3D architectural rendering studio working with clients in Brazil and Europe, with a quote within 24 hours.
In the property development sector, it is the basis for off-plan marketing: facades, communal areas, furnished homes and 3D floor plans that appear on property portals, brochures, billboards and social media. For a development that does not yet exist, it is the only way to show the product faithfully.
In product, brands replace photo shoots with 3D illustrations of furniture, appliances, packaging or jewellery. The same model allows colours, finishes and backgrounds to be changed without re-shooting.
In other fields it appears in advertising, medical and scientific communication, publishing, video games, film and educational material.
3D illustration vs 2D illustration
- Reuse: a 3D model allows many views of the same object to be generated; in 2D each image is drawn again.
- Precision: in 3D proportions and perspective are exact because they come from real measurements.
- Changes: modifying a material or the time of day in 3D is a matter of adjusting parameters and rendering again.
- Expressiveness: 2D illustration remains freer for very personal or gestural styles, and both techniques are often combined.
Common mistakes and good practices
- Incorrect scale: doors, steps or furniture out of proportion give the image away. Always model in real units.
- Flat lighting: without contrast or light direction, the scene loses volume. A clear key light organises the image.
- Too-perfect surfaces: in the realistic style, a little variation, wear or imperfection adds credibility.
- Careless composition: the rules of photography (straight vertical lines, rule of thirds, vanishing point) still apply.
- Insufficient resolution: for large print you work at 4K or higher; for web less is enough, but it must be decided before rendering.
3D illustration in a visualisation studio
For an architectural visualisation studio, 3D illustration is the core product: exterior, interior and floor plan images that help architects and developers communicate and sell a project. If you work in Spain, you can see how we apply it on our Spain page and in renders in Madrid, or review examples in the portfolio.
Frequently asked questions
What is the difference between 3D illustration, render and architectural visualisation?
In practice they are used almost as synonyms. Render is the technical process of calculating the image; architectural visualisation is the usual term in Spain for the architectural image; 3D illustration is the broadest concept and includes non-realistic styles.
What is the best program to start in 3D illustration?
Blender is free, very complete and has a large community, so it is a good starting point. In architecture, 3ds Max with V-Ray or Corona, SketchUp and real-time engines such as D5 Render or Twinmotion are also widely used.
Can a 3D illustration look like a photograph?
Yes. With precise modelling, physical materials, correct lighting and good post-production, a photorealistic 3D illustration can be difficult to distinguish from a photo.
What does a studio need to create the 3D illustration of a project?
Plans (floor plan, elevations and sections), materials and finishes schedule, orientation and location of the plot and, if they exist, photos of the surroundings and style references. The more information, the more faithful the image will be.