3D Modeling: An analysis of Polygonal techniques – MAP Systems
04 MAY, 2018
Today, various polygon modeling techniques have penetrated into the feature film industry. It is also used in the production of video games. The objects developed using this technique is composed of flat tiny surfaces and the size of the polygons are small. This prevents their edges from looking faceted. This indicates, that when the size of the object increases, thousands of polygons need to be created, in order to maintain a high resolution in the object. Here, you will come to know about the different techniques of polygonal 3D modeling, which can enhance the presentation of 3D models.
Basics of polygon modeling
Three different areas of an object can be integrated with these polygon modeling techniques. These are the vertices, faces and edges. You can select these in the Edit Mode, which you will find at the bottom of the screen.
Vertex : These points are present at the end of Edges.
Face : Face is the surface, located between 3 or more vertices.
Edge : These are lines connecting two vertices and keeps the faces surrounded.
Generally, triangles, or three-sided polygons and quadrilaterals with four sides are used in three dimensional modeling. The designers should know the polygon modeling tips and tricks in maya and they can create polygons having more than four sides.
Different techniques of 3D polygon modeling
Have a look at the different polygon 3D modeling techniques, used to develop polygons.
Chamfers or bevels
In the initial stages, the looks of the 3D model are not natural and the edges are not sharp. Using chamfers or bevels, you can create realistic 3D models with smooth surfaces. Usually, two polygon edges have a 90-degree angle between them. Bevelling the edges enables the modeler to create a 45-degree angle. You can also create other angles between these edges using bevel. The roundness and length can be changed, according to the requirement.
Most of the 3D modeling software comes with the extruder tool. Modelers use this tool to start shaping the polygons. You can apply this to a set of faces or a single face to create new faces of similar size. The modelers can use extrusion in manipulating a mash in two ways. They may either extrude the face outwards or collapse it within itself. Various different 3D modeling techniques can be used to extrude a geometric shape like pyramid or cube.
Extruding a pyramid: A pyramid with a base consisting of four edges can be transformed into a complex shape when the base is extruded downwards in the Y (negative) direction. Eventually, new vertical faces are created between the cap and base of the model. For instance, while modeling table legs or house, this process can be implemented.
Extrusion of edges: The modelers need to duplicate the edge, so that they can further rotate or pull it in any direction, along with a polygonal face that is automatically created, connecting the two edges. The experts use advanced polygon modeling software to extrude the edges in contour modeling.
As a 3D artist, you would strive to create smooth surfaces in the three dimensional models you develop. The process begins with the basic geometric shapes, like triangles and cubes. These are usually of low resolution and the number of edges is low. It is assumed that each face will be divided into smaller ones. As a result of this subdivision, the 3D model gets a higher resolution. You can have a look at the 3D modeling software for beginners and explore these features.
You can apply subdivision to the 3D model selectively or uniformly.
The entire surface of the 3D model is divided by a uniform subdivision. It is reasonable to use uniform subdivisions on a linear scale, which indicates that they will divide the face of the polygon into four faces. This helps in smoothening the edges of the model.
You can apply selective subdivision to certain parts of the surface. It is necessary to place additional edge loops in this type of subdivision. You can add this loop to a particular set of faces, without altering the other meshes. The modelers generally apply selective subdivision to elements like lips and eyes, that carry a high amount of details and need a high resolution. The use of 3D modeling in the film industry has been increasing over the years, as the modelers can integrate the fine details in the objects.
Well, another way to enhance the surface of the model without making it to smooth is to integrate both the subdivision methods. You can prepare a surface using edge loops, before uniform subdivision is used. You may also leave certain edges sharp by placing the edge loop before subdivision on one of the sides of the edge
However, chamfers and bevels are not the same. These are different in the following ways:
- Usually, bevels extend from one of the faces to another. Chamfer extends partially to the far face
- A bevel can meet another line or surface at any angle, except 90-degrees. A chamfer connects two lines and it is a bevelled edge. If the surfaces make 90-degree angles, the chamfer will be at 45 degree, creating symmetry
In case you need a dedicated support for 3D modeling service, you can get across to one of the established companies for these services. The reputed service providers also assist their clients in refining or correcting the shapes.
At MAP Systems, we deliver a dedicated assistance for 3D modeling to business firms from the film, gaming and other industries. You can have a consultation with us for creating polygon 3D modeling. Our team of modelers come with extensive exposure to the film industry.
If you are looking for an established team of 3D modeling service providers, feel free to reach out to us.