Though still photography, 3D animation and film provides photorealistic images to us, but they have also some limitations. 3D architectural visualization process enables professionals to produce synthetic images with photo-realistic quality that provide a comprehensive visualization of the project. The image assists viewers to understand the intent of the project and the design of the building interior and exterior in an efficient manner.
When an architectural model is made photo-realistic by executing the 3D rendering process, it is required to apply lighting effects to the model because lighting effects play a crucial role in enhancing photo-realism of the model. When the lighting effect is applied, the important factors need to be considered are physical accuracy, position of light sources and authenticity of light sources. Using 3D visualization technique, it is also possible to prepare daylight as well as night view of the building model. Therefore, viewers can easily understand how the building will look in different time of a full day. For fulfilling the requirements of lighting effect, HRDI light probes are used with progressive refinement radiosity. The images created by executing architectural visualization process are very eye appealing and the calculation time is proportional to the number of samples per patch.
When professionals add textures to the model, they mainly focus on the color, diffuse, luminosity, glossiness, reflection, refraction, transparency and bump aspects. All these surface properties are adjusted in the surface editor of the 3D rendering software as per the clients’ requirements.
Computerized 3D rendering process facilitates an easy and automated way to make everything photo-realistic by adding appropriate color, texture, lighting effects, texture and shade. A light probe is utilized to gain a highly effective panoramic radiance map near the location where the building will be rendered. The light probe is basically a camera focused at a mirrored sphere and a configuration generally used for acquiring environment maps. With the assistance of photogrammetry and 3D scanning process, a geometric model of the scene is developed and the model is mapped with radiance values that are measured using light probe. The distant external scene, internal scene and synthetic object are made photo-realistic with global illumination and the image view is made same as the background plate. The outputs are composited into the background plate by using 3D visualization techniques.
3D architectural visualization process has made possible to get a lifelike view of a building before it is built. Hence, it is very important for any kind of building project.
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