In these days 3D modeling reaches its mainstream
popularity. It is wildly used in both gaming and movie
environment as well as in science and engineering
sectors. So what is 3D modeling? In simple phrases,
3D modeling is a creation of fully rendering three-
dimensional objects or scenes. The product of 3D
modeling is called a 3D model or a 3D object.
1. Computer animated films industry uses 3D models for creation
of animated characters and objects.
2. 3D models are the basic objects in video games environment.
3. Medical industry often uses detailed 3D models of human organs.
4. 3D models of chemical compounds are wildly used in the science
5. Architects and real estate builders often use 3D to visualize
6. Engineers use 3D models for presentation of new devices,
As mentioned above, 3D modeling is on the crest of the wave and the field of its
application will increase year after year.
Two basic categories of 3D models
1. Solid 3D models are more realistic and complex to create and are
often used for simulation of medical and engineering objects as
they represent the volume of an object or a surface.
2. As to shell models, this category is more popular and is wildly used in gaming
and movie environment. Unlike solid models, 3D shell models represent the
boundary of an object, not its volume. They are also called boundary models.
Or a non-uniform rational basic spline modeling creates 3D
models for surfaces and curves representation. This type of
modeling has a lot of advantages such as:
• great flexibility;
• high precision.
This allows to create curves that we can often use in computer-
aided design, architecture and engineering (for example, in
Specific aspects of a NURB curve are the knot vectors, a set of
control points and the order of curves. These control points are
organized in a certain order creating a curve which can be seen in 3D
The curves can be quickly and efficiently assessed with help of
3d shapesThis type of 3D models is
the most common form of 3D models;
it uses polygons to create a shell of a
3D model. For this reason it is often
called Shall modeling. Polygonal or
shall 3D models are used in creation
of animated movies and in video game
industry. Using polygonal modeling
you can create simple shapes, such as
triangles, quads and cube. These
simple shapes are called object
primitives and they all can form the
basis of a complex 3D polygonal
model.The basic object of polygonal
3D model is called vertex - the
coordination points in three-
As we noted, each polygonal 3D model consists of vertices, edges
and faces. Let’s consider these components in details.
• Vertices define the structure of faces. When you move the
vertices (push or pull) or edit them (you can edit the x, y, and z-
axes), this affects the shape of the faces. This is the most
common technique in 3D software programs like Maya and 3d Max
and it helps to create the final shape of a polygonal 3D model.
Independent vertices can be also used to create faces, but they
will be invisible when rendering a model.
• Edges: are points on 3D model surface where two polygonal faces
• Faces: one of the main differences between NURB modeling and
polygonal modeling is that each polygon shape creates a face. So the
surface of a complex 3D model consists of hundreds of geometric
Professional 3D animators try to create 3D models with many
details and of high resolution (or polygon density) to make the
final model look smooth and natural when rendering.
Textures and Shaders
Shaders : are wildly used to produce lightning and shades in 3D
modeling. It is a set of parameters applied to a 3D model allowing to
adjust light, opacity, reflectivity, shading and a lot of other
parameters. Shaders are often applications available in a standard 3D
Textures: Texturing or mapping is another method of adding realistic
look to a 3D object. You can overlay a two-dimensional image or even a
real photo of a texture on the surface of your 3D model. This process is
known as texture mapping and allows to achieve a high level of details of
There is a great number of techniques and aspects of
3D modeling we should use to reach the desired result.
Proper texturing and shading make a great contribution
to the realistic effect of a modeled object.
Veetil Digital is a part of the highly diversified Veetil Group of companies. We are a
total digital services company covering all aspects of business. Our objective is to
make your life easier by taking care of all your digital needs that include 3D
visualisation solutions for your design and marketing requirements, software and web
based solutions for all your business processes thus making them more efficient and
Veetil Digital Services
P.O.Box 2149, carlisle North,