Basics of Rendering
This article is for those who are not designers but have interactions with designers, designers but not familiar with rendering. From the basic story, a little technical story, we have put together the necessary knowledge on Rendering.
The word “rendering “often used in 3D CG terms. You may be using it somehow, but if you understand in this article what kind of mechanism and process are specifically performed in this article, interaction with the designer will be smoother!
What is rendering?
Rendering is the process of calculating an image on 3D CG software. It is the process of calculating materials (texture) texture (pattern) lighting (light source) etc. and calculating the final image.
Using computer programs you can generate not only images but also videos and sounds.
Render means the words translate and express. The word rendering broad meaning can be expressed as a way to express a certain form of information.
It is a word used in various situations such as web system, but in this article, we treat 3D space in computer as meaning to export as 2D image (graphic).
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This is similar to camera shooting in the real world. The process of determining the subject thinking about composition and lighting and taking pictures may be similar to rendering.
The difference is that rendering is done on a computer so it is very flexible and you can easily reproduce situations that are difficult in the real world. The disadvantage is that the rendering time depends on CPU processing power.
Due to the complex machines and actions in the movie “Transformers” series it took 288 hours to render one frame.
The image on the left is the modeling software that models the chair and imports it into the rendering software. In this state it is difficult to convey the feeling of the material and the actual scene to be used.
So if you specify a wood texture for this model it looks grainier and looks more realistic than the bare state as in the right image.
This is still a simple rendering, allowing for more realistic renderings with detailed texture settings, camera position, angles, lighting, material adjustments, and the presence or absence of backgrounds.
The general rendering flow is
- Grab the image you want in simple rendering
- Determine the angle by adjusting the camera placement and settings
- Win a leading role in adjusting the placement and settings of light sources
- Realize by adjusting material and texture settings
- Final rendering
Perform the final rendering by repeating the settings and rendering from 1 to 4. If there is no 3D data to render, a modeling process is included before 1.
Rendering type:
Depending on the content and purpose of the render, there are different types of renders available. Each has different effects, advantages and disadvantages, but basically the designer will render with the type that suits the purpose.
However, understanding the differences between types makes it easier to convey requests, so there is no loss in mind. Here are some typical ones.
Ray tracing (Ray tracing)
It is one of the most widely used calculation methods today. It is also used in games, etc. to draw realistic light, shadows and reflections with high quality. More shapes, more reflections, drops, and more refraction take longer to render, but you can export realistic images.
Scan line (Scanline rendering)
This is a method of dividing the screen into rows and calculating and rendering the depth for each row. Although relatively fast, the quality of the resulting image is basically inferior to ray tracing. However, depending on the technique, it is possible to create beautiful shadows, and it is also possible to express faster than real ray tracing.
Z buffer method (Z-buffer)
A rendering method that determines the depth of the model for each pixel and eliminates the part that cannot be seen by the camera. Because the algorithm is relatively simple, you can render in a short time. However, it is not suitable for expressing a model using transparent materials (materials). It is necessary to be careful because the memory area required is large in order to temporarily reserve a storage area for depth information for the entire screen.
Toon rendering (Cel-shading)
This is a method often used for animation and so on. It deviates a little from the main subject, but let’s introduce it as it has been used in recent years. Roughly speaking, it is a method of daringly expressing 3D. Since 3DCG, which tends to be realistic, can be used to express various actions that are difficult with handwriting etc., works that describe the entire work with toon rendering are also increasing.
Usage of image rendering
Not only images but also images and sounds can be generated, but there are many ways to use image rendering such as product images and animations and image sharing for development.
It is also frequently used in corporate product catalogs and can reproduce situations that are difficult to shoot and difficult to shoot.
For example when creating a catalog of newly released cars, it takes a huge amount of money if you shoot everything such as an image running in a city or a foreign country. Therefore if you use 3D data to create images on your computer, you can save money.
Information and precautions necessary to place an order
When ordering 3D data required for image materials and ordering image rendering, there are various precautions such as delivery date budget, and man-hours.
First of all the more complex the 3D data to create the longer the delivery time and the more budget. A car is more expensive if it has more parts and more complex shapes like cars, and less furniture and more geometrically shaped furniture.
There are many CG production companies that generally make corrections up to two times. An increase in the number of steps here also means an increase in costs. By having a specific image at the ordering stage and communicating the details of the corrections, the exchange will be smooth.
The more detailed the 3D data documents (drawings, photos, illustrations) to use, the usage of the images, and the points you want to stick to, the smoother the data will be created by the designer.
Example of production (Corporate results / expenses in Modeling)
Management source of NBY IT Solution has conducted the creation and image rendering 3D data needed to produce the image material in.
After creating 3D data based on 2D drawings photos and illustrations, it is rendered and delivered as high quality jpeg and png image data. If you are not familiar with it a dedicated person in charge will create one-stop creation of 3D data that is absolutely difficult.
The 3D data and images to be delivered can be used for product images in catalogs and image images such as posters. You can express a visual with an impact that feels the depth that cannot be expressed in illustrations and photos. From characters and realistic animals to flames, electricity and water textures, it supports a wide range of effects creation!
if you are looking for best Outsourcing 3D Modeling Rendering and Animation Studio NBY IT solution is the best solution for your need. feel free to contact with us for your custom price quotation.
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