Besides platform-based BIM project management, another common approach involves using BIM software plugins for visual project management. Typically, BIM software’s built-in visualization plugins are employed for rendering, walkthroughs, applying materials, and integrating timelines to visually manage BIM projects.
For example, with Revit Architecture—a plugin for Autodesk’s BIM software Revit—the BIM model can directly utilize the plugin for perspective rendering, walkthrough animation creation, and lighting and shadow analysis. The model creator uses the BIM software plugin to perform visualization and information presentation of the BIM model through the following steps:
(1) Material Assignment
Rendering the BIM model involves assigning AEC-level materials and textures to components. By adding realistic appearance textures, near-photo-quality images of the engineering project BIM models are generated.
(2) Camera Settings
The model creator sets a camera path that moves through the scene. This path consists of building information segmented by frames and keyframes, where keyframes represent adjustable camera positions and directions. By default, BIM software creates model walkthroughs as a sequence of perspective images, but orthogonal 3D views can also be used. This setup enables smooth roaming through the BIM model.
(3) Lighting Simulation
Lighting is a fundamental component in scene rendering and can be simulated dynamically or statically. The software simulates sunlight to reflect real environmental conditions by adjusting lighting parameters to match the sun’s actual direction. Accurate lighting and shadow effects require aligning the view direction with real-world values.
(4) Shadow Effects
Shadows play a critical role in lighting studies and are added to the scene to enhance realism, making the BIM environment more reflective of real-world engineering projects.
By following these steps, model creators gain better insights into how building shadows and site topography affect the project. Understanding natural light and shadow impact provides valuable data on light intensity, shadow direction, and shadow length within the surrounding environment. Adjusting location, date, time, and lighting settings allows for high-quality 3D and camera perspective renders. Further refinement is possible by tweaking resolution and lighting conditions.
However, there are limitations when using built-in BIM software plugins for rendering. These plugins primarily render the visual appearance of building elements but cannot simulate the physical properties of BIM models fully. Additionally, rendering requires creating camera perspective views to generate scenes from various angles and locations. Rendering speed is influenced by the user’s hardware, including image resolution, graphics card capabilities, and CPU count.
To optimize performance, it is necessary to hide secondary BIM elements, reduce information detail in views, lower the level of detail, and limit the amount of building data displayed in 3D views. Reducing the number of objects, minimizing rendering areas, and focusing only on essential parts improves efficiency. Techniques such as using section boxes, cropping areas, and camera cropping planes further limit rendering scope. These optimizations often come at the cost of reduced rendering effects but are essential for managing performance.
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