3D rendering glossary
3D Animation: What It Is, How It Works and Applications
3D animation is the technique of creating moving images from three-dimensional models made on a computer. Objects, characters or cameras are moved within a virtual scene, and the software renders each frame in sequence, usually 24, 30 or 60 frames per second, generating a video. It is used in cinema, games, advertising, architecture and product.
How 3D animation works
The basis of nearly all 3D animation is the keyframe. The animator sets the position, rotation or scale of an element at certain moments, and the software calculates the in-between frames (interpolation). Animation curves control the easing, so that movement starts and ends naturally, without jerks.
The complete process usually follows these stages:
In practice: Render Fabrik is a 3D architectural rendering studio working with clients in Brazil and Europe, with a quote within 24 hours.
- Script and storyboard: what will be shown, in what order and with what duration.
- Modelling: creation of objects and the scene in 3D.
- Materials, textures and lighting: define the visual appearance of each surface and the mood of the scene.
- Rigging: for characters and mechanisms, a "skeleton" of controls is created to allow movement.
- Animation: keyframes of objects, characters and camera.
- Simulations: water, cloth, smoke, vegetation in the wind, crowds.
- Rendering: calculation of each frame. A 1-minute video at 30 frames per second has 1,800 images.
- Post-production: compositing, colour correction, soundtrack, text overlays and final editing.
Types of 3D animation
| Type | How it is made | Example |
|---|---|---|
| By keyframes | The animator manually positions the key moments | Camera moving through an apartment |
| Motion capture (mocap) | Real actors' movements are recorded and applied to characters | Films and games with human characters |
| Procedural and simulation | Physical rules or algorithms generate the movement | Pool water, trees in the wind, flow of people |
| 3D motion graphics | Animated shapes, texts and logos | Idents, opening titles for corporate videos |
| Real time | Game engines render instantly while the user interacts | Games, interactive tours, virtual reality |
3D animation vs 2D animation
- In 2D, each frame or element is drawn on a flat plane. Changing the viewing angle requires redrawing.
- In 3D, the model exists in space. The camera can rotate, move closer or fly around it without rebuilding the object.
- Cost of changes: in 3D, changing a material or lighting only requires re-rendering; in 2D, it may require redrawing many scenes.
- Style: 2D remains strong for graphic and authorial styles; 3D dominates when realism or volume is sought.
Where 3D animation is used
In architecture, animation shows the project as an experience: arriving from the street, entering the lobby, moving through spaces and light changing throughout the day. It helps clients understand scale and flow better than isolated images.
In the property market, the 3D video of the development is a central launch piece: flyover of the site, facade, leisure areas and show flat. It is used in sales galleries, websites, adverts and social media, often in horizontal and vertical versions.
For products, animation explains operation and assembly, shows the product rotating 360 degrees, opens and closes parts in an exploded view and highlights details that a photo cannot reveal.
In other fields, it appears in films, series, games, advertising, medicine, engineering and education.
Good practices and common mistakes
- Camera too fast: abrupt movements are tiring and confusing. In architecture, the camera should move like a real person or drone.
- Lifeless scenes: a static environment looks like a scale model. People, vegetation in the wind, water reflections and passing cars add credibility.
- Flicker: noise that changes from frame to frame reveals insufficient render settings. Proper sampling and lighting cache solve it.
- No script: a video without a beginning, middle and end becomes a sequence of loose shots. Define what the viewer should feel and remember.
- Wrong format for the channel: planning from the start the 16:9 versions for website and TV and 9:16 for social media avoids bad crops later.
3D animation in a visualisation studio
In an architectural visualisation studio, 3D animation is created from the same model used for still images, ensuring consistency across all deliverables. Discover the 3D video service, the 3D virtual tour option for free navigation, and the architectural visualisation work as a whole.
Frequently asked questions
Which software is used to create 3D animation?
Blender, Maya, 3ds Max and Cinema 4D are among the most used. In architecture, Lumion, Twinmotion, D5 Render and Unreal Engine are also common, as they speed up production with real-time rendering.
What is the difference between 3D animation and 3D video?
3D animation is the technique of bringing a three-dimensional scene to life. 3D video is the final product, the video file generated by this technique, already edited with soundtrack, texts and cuts.
Why does 3D animation take longer than a still image?
Because every second of video requires dozens of rendered frames, as well as dedicated stages such as scripting, camera movement, simulations and editing. The amount of computation is much greater than that of a still image.
In what resolution should a 3D animation be delivered?
Full HD (1920x1080) meets most web needs. For large screens, sales galleries or TV presentations, 4K (3840x2160) is the recommended standard.