3D Modelling & 3D Rendering Design

The terms “3D modelling” and “3D rendering” are sometimes used interchangeably, however this is not totally correct. Both are part of a 3D workflow and revolve around developing a digital visual representation of an object using CAD (computer-aided design) software. Regardless, each phrase relates to a distinct set of procedures and outcomes. In the procedure, 3D modelling comes before rendering, which means you may create a 3D model without a rendered image, but not the other way around.


On a computer screen, 3D modeling’s fundamental purpose is to produce a virtual three-dimensional depiction of an object. Techniques such as polygonal modeling, digital sculpting, curve modeling, and laser scanning, among others, can be used to create a 3D object, depending on the software utilized. As a result, there are a variety of file formats.

Every command in CAD software is translated into a visual point by a computer, which treats it as a collection of mathematical calculations. To make a 3D model, the artist or modeler uses CAD software to issue a series of commands or inputs, which the computer then executes and displays as a digital drawing of the thing. However, unlike a traditional photograph, the final image must be three-dimensional and visible from any point of view.

3D models mainly come in three different types:

Solid modelling

Every three-dimensional solid model is made out of basic geometric shapes like cylinders, cubes, spheres, cones, and rectangular prisms. They all work together like building pieces, adding to or subtracting from one another to form the object’s intended shape. If your CAD software has modifiers, you can mill the object as if it were physical. In digital prototyping, solid modeling is a very simple approach that prioritizes dimension accuracy.

Wireframe modelling

The wireframe technique is the method of choice when a 3D object has intricate curves and surfaces. More triangles or other planar shapes (greater polygon count) offer a better degree of realism to wireframe modeling. The final drawing depicts the object’s structural framework, with “metal wires” connecting the vertices. A wireframe model does not have a visible surface, allowing the interior components to be seen.

Surface modelling

this technique comes in helpful. Surface modeling makes it simple to create complicated objects that would be nearly impossible to make using solid or wireframe techniques.

A digital file is the output image of any 3D modeling effort, regardless of the type. More techniques, such as product development, 3D printing, and milling, would be required to turn the digital file into a physical object. A rendering method can also be used to convert the 3D object into hyper-realistic digital and physical media, such as pictures or movies.

Surface modeling, the most difficult of the three, employs guide lines to establish an object’s curvature and contour (or parts of it). When a 3D object requires smooth surfaces and flawless integration between them.

3D rendering services

After a 3D model has been created, it is ready for rendering, which converts the three-dimensional item into a two-dimensional image. The end output resembles an image, except that it was created by a computer rather than shot by a camera. In addition, unlike photo manipulation, which begins with a 2D image, rendering begins with a 3D model. Rendering is the process of converting data contained in a 3D object into a more intelligible and easier-to-perceive digital image. A render artist can adjust color, texture, lighting, shadow, and viewing angle by adding more data or photorealistic effects if necessary.

An artist can render a 3D object using a variety of ways, similar to 3D modeling:


Rasterization, one of the first rendering techniques, interprets a 3D object as a mesh of polygons. The information is injected into the vertices of the polygons, which effectively operate as borders, to provide the object colors, textures, and location. After that, the data-loaded vertices are projected onto a plane. Only the vertices are filled with data at this point; the next step is to fill all of the remaining pixels with the correct colors to finish the rendering process. Despite the introduction of a variety of innovative approaches, rasterization remains one of the fastest and is thus still commonly used today, particularly for real-time representations such as interactive GUIs, computer games, and simulation. Smooth edges have now been achieved thanks to anti-aliasing and better resolution features.

Ray casting

The technique simply casts rays of color and texture onto the model from the intended point of view, as the name implies. Because the produced image is two-dimensional by definition, you can only see one camera angle at a time. The ray casting technique encircles each and every pixel. Only the uppermost layer (the surface first struck by the rays) will be seen in the render in the case of an overlapping surface.

Ray tracing

The difficulty of ray casting to correctly recreate shadows is its main flaw. Ray tracing, which works in the same way as the approach at the start, is an upgrade. However, as soon as the first rays strike the item, secondary rays are emitted, resulting in shadows. The qualities of surfaces dictate whether there will be shadows, such as when the surface blocks the rays (or light source). The rays will bounce off reflective and refractive surfaces in the right direction and intensity. Depending on the qualities of the surface they impact next, secondary rays can generate multiple sets of rays. The technique is known as recursive ray tracing since it allows for an infinite number of rays.

You now understand 3D modeling and rendering. As you can see, they all have various functions, therefore you can combine them in a project to get better results. And, given the trend toward digitalization in architecture and design, incorporating modeling tools and techniques into your workflow process is a wise decision.

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 Simply call us at +974 7446 9729 to learn more about how we may assist you. Alternatively, you can send an email to hello@alhirfa.com, and we’ll get back to you as soon as possible.