What is Parametric Modelling & How Does it Work?

3D parametric modelling is a computer-aided design (CAD) technique that involves creating 3D models using parameters, relationships and constraints. It allows designers and engineers to build and manipulate 3D objects while maintaining control over various design parameters.

Defining parameters: Parameters are used to represent dimensions, angles or other design features. For example, you might define the length, width, height and various angles of the object as parameters. These parameters can be given values, formulas or relationships to each other.

Adding constraints: Constraints are rules or relationships that define how certain parts of the model are related. Common constraints include geometric, dimensional and assembly constraints. These constraints ensure that the model maintains its shape and relationships as you make changes.

Relating features: Features in 3D models can be related to each other through parametric relationships. For example, you can specify that the height of an object is equal to double its width. If you change the width, the height parameter will automatically adjust to maintain the relationship.

Parametric modelling allows designers to create models that are highly flexible and modifiable. This can be useful in design processes where designers make frequent changes that could have a substantial impact on the final design.

This approach is conducive for iterative design, allowing designers to explore multiple design variations. Parametric modelling can help designers refine and optimise a 3D model over time.

Parametric modelling can also streamline and automate numerous tasks, which helps improve designer’s efficiency and accuracy so you can focus on creativity and problem-solving.

3D parametric modelling is widely used in various industries due to its flexibility, efficiency and ability to create complex and adaptable 3D models. Here are some common applications you might come across:

1. Product design and manufacturing

2. Architecture

3. Aerospace

4. Automotive

5. Electrical engineering

6. Industrial equipment design

7. Gaming and entertainment

8. Art

These are some of the most used applications of parametric modelling, though as creative designers are continually finding new ways to make the most of technology, this list will definitely keep growing.

Some major limitations of parametric 3D modelling include the high learning curve that comes with the process. To take advantage of all the benefits parametric modelling can offer, a designer needs a strong understanding of parametric relationships and constraints and understand how to employ them effectively.

While establishing relationships and constraints can facilitate a design, it can also limit creativity and design freedom. A complex model with numerous relationships could become difficult to manage as well.

Finally, designers may find accessibility as a limitation to consider. In the end, there are design tasks that might not be suitable for the parametric modelling approach.

3D parametric modelling enables the creation of complex 3D objects through parameters. It is a versatile and powerful tool that can be used in many fields to design, visualise and analyse a wide range of models and structures.

If you want to explore a new approach to 3D modelling, we invite you to explore our 3D-modelling solution: Adobe Substance 3D Modeler. Modeller is a voxel-based approach to 3D design, which fully automates topology and UV unwrapping at export.