3D rendering glossary
What is rendering: guide to professional proposals
Rendering is the process by which a program calculates an image or video from a 3D model, including its materials, lights and camera. In professional proposals, the render is used to present an architecture, interior design or product project before it is built, so that the client understands, compares and approves what is being offered.
What rendering is and why it matters in a proposal
Rendering consists of simulating how light interacts with every surface of a virtual scene: how much a polished floor reflects, how sunlight passes through glass, or what shadow a cantilever casts at five in the afternoon. The result is an image that can look like a photograph.
In a proposal, that image changes the conversation. A client who cannot read drawings understands a render in seconds. A competition jury compares proposals by their visual clarity. A developer decides with more confidence whether the product they are about to launch has the look the market expects. That is why the render is no longer an extra but has become part of the documentation of any serious proposal.
In practice: Render Fabrik is a 3D architectural rendering studio working with clients in Brazil and Europe, with a quote within 24 hours.
Types of rendering
| Type | How it works | When to use it |
|---|---|---|
| Offline render (photorealistic) | Ray-traced calculation, taking minutes or hours per image | Final sales images, competitions, advertising |
| Real-time render | Engines such as Unreal Engine or Twinmotion calculate the image instantly | Quick revisions, interactive walkthroughs, configurators |
| Study or volumetric render | Neutral materials, shadows and simple lighting | Early phases, massing and sunlight studies |
| Stylised render | Watercolour, drawing or flat colours finish | Conceptual proposals, preliminary designs |
| 3D animation and film | Sequence of images with camera movement | Launches, presentations to investors, social media |
| 360° panoramas | Navigable spherical images | Virtual tours, remote visits |
What a proposal with renders should include
- A hero image: the view that sums up the project, usually the facade or the most representative space, with the best light.
- Supporting views: interiors, communal areas, material details or an aerial view that explains the surroundings.
- Rendered floor plan: the layout with furniture, so the client understands dimensions and circulation.
- Comparable alternatives: if two finishes or two massing options are proposed, show them with the same camera and the same light so the comparison is fair.
- Minimum technical context: areas, proposed materials and a note clarifying that the image is illustrative where appropriate.
Uses in architecture, development and product
- Architecture studios: preliminary design presentation, competitions, client approval and communication with the local council or the homeowners' association.
- Developers and builders: proposals to investors and financial institutions, off-plan sales, materials for the sales office and property portals.
- Interior design: refurbishment proposals with two or three finish options for the client to choose from.
- Product: manufacturers presenting a new collection to distributors before producing physical samples.
Frequent mistakes in rendered proposals
- Promising what will not be built: higher-end materials, non-existent views or removed neighbours create expectations that later lead to claims.
- Too many mediocre images: three careful renders are more convincing than fifteen with the same flat lighting.
- Neglected scale and surroundings: people, cars and vegetation out of proportion reduce credibility.
- Arriving late: commissioning renders at the last minute forces you to cut revisions. It is advisable to plan them when the preliminary design is finalised.
- Ignoring the final medium: an image intended for screen will not stand up to large-format printing.
Most-used rendering software
For modelling, 3ds Max, SketchUp, Revit, ArchiCAD, Rhino and Blender are used. For rendering, Corona and V-Ray dominate photorealistic architectural visualisation; Unreal Engine, Twinmotion, Enscape and Lumion cover real-time; Cycles is Blender's integrated option. Post-production is usually done in Photoshop or similar tools, and video in editors such as After Effects or DaVinci Resolve.
Rendering for proposals at a visualisation studio
A specialised studio provides what a proposal needs: photorealism, consistency between images and the ability to change quickly when the client asks for another option. Render Fabrik prepares 3D renders, videos and floor plans for architects and developers in Spain and Brazil. More details on our Spain page, renders in Madrid and in the portfolio.
Frequently asked questions
How many renders should a proposal have?
It depends on the project, but the usual is one main image and between two and five supporting views. For a single-family home, one facade and two interiors are usually enough; for a development, it is advisable to add communal areas and an aerial view.
What is the difference between render and rendering?
Rendering is the calculation process; render is the word used both for the process and for the resulting image. In Spain, the final image is also called 'infografía'.
Can a real-time render be used for a final proposal?
Yes, especially for interactive walkthroughs and revisions. For high-resolution sales images, offline rendering still gives more control over light and materials, although the difference has narrowed.
What do I need to send for the renders to be prepared?
Drawings in DWG or PDF, the 3D model if it exists, the materials schedule, the plot orientation and references of the style you are looking for.