Real-time Rendering App Unreal Engine / Unity

Real-time rendering is not new – it has been used in the gaming industry for quite a long time but now we can surely say that it has also become one of the most important parts of the world of real estate.


Real estate developers from all over the world pay close attention to this technology because it actually allows visiting a property before selling or buying it, which proved to be beneficial for both property developers and their clients. But let us have a look at how all of this magic is happening.

In a nutshell, the architecture of real-time rendering consists of the following stages – application, geometry and rasterization. During the application stage we generate ‘scenes’ in 3D which later will be shown on a regular 2D display.

The geometry stage is when actually most of the polygonal modelling is happening – it may sometimes be subdivided into several consecutive stages (model and view transformation, lighting, projection, clipping and screen mapping). The final stage is rasterization – here the colour is applied and graphic elements are turned into pixels or picture elements.

Basically, this is an animation which is rendered so quickly that it appears as if it is being produced in real time. Each image is rendered in less than 1/30th per second. When user input can be analyzed and responded to so promptly, it creates a really interesting experience of interaction in real time.

The immersive technology provides a great personalized journey – a wonderful adventure where homebuyer has the opportunity to fly or walk around the place. This is not your ordinary animation where you passively observe what video creators decided to show you. With real-time rendering you are in full control of what is happening on the screen. Changing certain settings, you are able to move around, open and close the doors and windows, switch on and off light or TV-set, remove parts of the wall or even the whole roof to see a building from another angle.


There are multiple platforms for creating this technology, however, the two most popular nowadays would probably be Unity and Unreal Engine. These used to be merely game engines but now they are widely used for residential and commercial real estate real-time-rendering in order to create, e.g., a walkthrough or a master plan of a building under construction.

When choosing a certain platform, apart from some personal preferences, we usually base our choice on advantages each engine may offer.

So if compared side by side, Unity is

– more suitable for mobile applications

– less resource-consuming

– used by smaller companies (which is quite logical considering the previous point)

– and, you may argue with that, as a result – quality of the picture is a little lower compared to Unreal

As for Unreal Engine, it is

– more resource-consuming

– used by larger companies

– leaves you with a higher-quality image

As you can see, you should choose your preferences depending on the cost and format of your project.

Here at VisEngine, we use both of these gaming engines for non-gaming applications. With the help of, e.g., Oculus Rift, an immersive technology for virtual reality, we create interactive virtual tours where you may visit a property before buying it. Unbelievable as it might seem, you may not only see your future property in pretty pictures, but actually walk through the rooms in the house as if it were in real time. It is indeed a revolutionary technology that allows us to speak about real-time architectural design and opens new perspectives in terms of real estate sales.

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