In the fields of architecture and interior design the use of a rendering software, that is 2D digital images that simulates reality, has become essential nowadays because it allows to visualize a project before it will be reality.

The rendering technology offers the extraordinary possibility to photograph virtual spaces or buildings that are projects on paper and don’t exist yet. This explains why it has become so popular: thanks to rendering it is possible to show the project changes to your customers or to your staff clearly and down into details, long before actual remodeling or building is carried out. In this sense it is a powerful and effective tool of communication remarkably reducing errors, misunderstanding or incomprehension, with enough time left to make eventual changes. In the era of Metaverse and of the Virtual Reality the popularity and the performances of these techniques will undoubtfully increase. In particular the expression Real Time Rendering is more and more often used today. But what is it exactly?

What is Real Time Rendering?

This expression reflects the extremely high speed of the rendering process: circa 30 images or frames per second created and visualized instantaneously. Thanks to this characteristic the real time rendering engines allow to create quickly real animations of the rendered project as those that you can create using software like Lumion or Twinmotion.

In this case the illusion of movement is created in the same way the single photograms follow one another in a film. These are 2D static images like photographs that pass quickly in front of a film projector. Thanks to the extremely high processing speed and therefore to the possibility to create and show instantaneously different images, Real Time Rendering allows to simulate the real time navigation inside your project being applicable to the creation of virtual worlds but also to experience augmented reality.

The user can turn the gaze toward all directions having the sensation to move in a 3D scene just as it happens in video gaming for example. In this case the experience becomes even more immersive and realistic if the navigation occurs through a Real Time Visor.


ArredoCAD Virtual Reality Experience!

Real Time Rendering developed in the world of videogames when Tim Sweeny, founder of Epic Games, released the first version of Unreal, a computer graphics game engine. The increasing popularity of this technology in other sectors like architectural and mechanical design, furnishing as well as animation or the creation of special effects started after the release on the market of Unity, a real time engine that became freely accessible thanks to the decision of its creators. In this way the popularity of this engine increased as well as the application fields.

Wich is the difference between Real Time rendering and Offline Rendering?

Rendering is the conversion of the 3D geometric model to which textures are applied into 2D digital images that are as similar as possible to reality. The realistic final effect is created through the use of different calculation method and light source simulation, like Path tracing or Ray tracing, that light scenes as faithful as possible to real scenes.

Basically, there are two rendering types: Real time rendering and the traditional rendering engines, also called Pre-rendering or Offline, like Vray. The time reference “real time” means processing dozens of images per seconds created in real time. This is the main difference compared to offline rendering. It processes the rendering of one image taking some seconds or some hours depending on how many objects, reflecting or transparent surfaces are contained in the scene and on the image format needed. The advantage of offline rendering is the possibility to render scenes in high resolution, with higher precision of calculation and, above all, with a higher rendering quality that can reproduce photoreal effects. This happens thanks to a control of the parameters that are often a lot and that characterize the final results, undoubtfully higher compared to the one of a Real time rendering. Moreover they require less performing hardware requirements and therefore they are more affordable.

Real time render - Living room image

Advantages and disadvantages of Real time rendering

Due to the very high number of images to be processed very fast, Real time rendering has been developed trying to find a compromise to satisfy different needs like boosting speed as well as image quality that has improved in the latest years thanks to technology development. For the same reason hardware equipments particularly powerful, and therefore, very expensive are required. An important example is the Graphic Card (GPU) the device that is more exploited during rendering.

Undoubtfully, the advantages of Real time rendering are remarkable compared to the images created using Offline rendering, Let’s see which are the main ones:

  • Extremely fast rendering with less expenditure in time;
  • Creation of presentations for final customers extremely eye-catching, exciting and immersive;
  • Interactive visualization of the whole project from every point of view with the possibility to freely move inside it and to modify colors, materials and light in real time;
  • Few time needed to change the scene or to visualize variations of the project before launching the final render avoiding possible errors.

Real time rendering and Offline rendering: all in one software

ArredoCAD, one of the main 3D interior design software, offers different tools for visualizing and rendering projects already integrated in the program. It this way, it is possible to make the best use of the advantages offered by the different technologies mentioned above.

In particular, the RealTime Player, is based on the Unit technology and it allows users to navigate inside the project in real time and in high resolution with the possibility to modify light and materials, move objects, open doors and drawers. It interfaces with the visor for Virtual Reality Oculus/Meta Quest, so that customers can make a more realistic experience.

Moreover, thanks to the plug-in “Click and Watch – 3D Web Player, users can export scenes and send them to customers through a simple link. The project can be navigated comfortably from home using any kind of device (PC, smartphone, tablet etc. with no additional software or app activation) visualizing 3D spaces in high quality. Last but not least, you will be able to use an Offline rendering engine,DLux, beside the Real time render. It has been developed by our ArredoCAD technicians making the best use of the LuxCoreRender potential.


Would you like to know all rendering and design tools available in ArredoCAD? Try it free 30 days!