Note: This article is written and published in Ukrainian and is a translated version of the original published here.
The most interesting tool for such modeling in Fusion is Form. Unlike classical solid-state modeling, this approach allows you to work with the form much more freely – in fact, as with clay. This is what makes creating smooth and natural surfaces, typical of upholstered furniture, much easier and faster.
 Готова модель сімейства у Autodesk Fusion Готова модель сімейства у Autodesk Revit |
Modeling usually starts with one of the basic shapes: a cube, a cylinder, a sphere, or a plane. The choice of the initial shape directly affects the convenience of further work with geometry and the correctness of building the model. Therefore, the basic shape should be selected depending on the future plasticity of the object and the logic of its deformation.
|
 Базова форма площини циліндра в інструменті Form для подальшого моделювання геометрії |
Before starting the simulation, it is necessary to determine the number of polygons of the basic shape. This example uses the cube as the starting geometry for further work in Form mode.
The number of polygons directly affects the level of detail of the model: the denser the mesh, the more malleable and detailed the shape can be. At the same time, the balance between detail and geometry optimization remains key.
Too many polygons increase file weight, make editing difficult, and can negatively affect the performance of the BIM model in Revit. It should also be borne in mind that if the geometry is formed incorrectly – when the polygons intersect or the grid becomes too complex – problems may arise during import, up to a partial loss of elements or incorrect display of the model.
 Приклад збільшення полігонів в кубі |
With the Modify function, you can adjust the shape after creating the basic geometry. By selecting the necessary elements, you can change the position of individual parts of the model and control its deformation. Editing is available at the level of points, edges, or planes – depending on which element needs correction and what result you want to achieve.
 Моделювання форми |
A wide range of geometry editing tools are available in the Form section, including freezing and locking elements to prevent accidental changes when working with the model. If the object is symmetrical, the shape can be split in half using the Symmetry tool: changes made to one part are automatically applied to the other side, ensuring precise symmetry and reducing the time spent working on geometry.
 Інструмент Symmetry |
To form a clear and even contour, the Crease tool was additionally used. It allows you to create pronounced ribs and form a “seam” in the geometry – which is especially important for conveying the characteristic lines of furniture elements.
When working with Crease, it is very important to control the initial shape of the cube at the initial stage: a uniform and properly structured grid ensures the formation of a solid line without deformations and geometry breaks.
 Інструмент Crease |
If the form is built correctly, Autodesk Fusion allows you to complete the simulation without significant complications. I strongly advise you to periodically close the current form and return to editing it through the Timeline.
 Готова модель виконана за допомогою інструмента Form |
Special attention should be paid to the process of importing models from Fusion to Revit. The topic has many nuances – the choice of export format, the sequence of import, parameterization of forms and symbols. Therefore, I highly recommend reading the article by my colleague Anastasia “Fusion as a family editor for Revit: optimization, parameterization and exchange between applicatio....
After converting the imported forms, you need to ensure their parameterization, for example, by height. To do this, you need to add the shapes to model groups along with Reference Lines, which are then linked by geometric or dimensional dependencies to the reference planes.
 Вигляд сімейства спереду та приклад параметризації висоти через опорні площини і залежності |
Another important issue is the constant display of the family signage in the plan, regardless of its position in height, because it will not be displayed if the geometry of the family is higher than the view range of the plan. This is solved by placing an invisible vertical model line with its height controlled by the _Floor Height parameter. Accordingly, as long as it is within the visibility range of the plan, the signage will be displayed, and it, in turn, is created using two-dimensional Symbolic Lines and Masking Regions.
 Відображення умовного позначення сімейства в плані |
As a result, even when working with complex geometry, it is quite possible to achieve an optimal result with relatively lightweight families that ensure stable model operation and high-quality BIM content for further design.
The topic remains open for further research, especially in the context of optimizing the interaction between Fusion and Revit on the part of developers. It would be really great to be able to directly attach ready-made Fusion models while preserving their structure, parameterization, and types at no additional cost.
You can download the ready-made family for review in formats for Autodesk Fusion, AutoCAD, and Autodesk Revit:
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.