3D rendering has become a part of our daily lives. It’s something we see every day but may not realize. The animated cartoons you watch on the TV, billboards you see on the streets, pictures present in the magazines you read may all be 3D rendered images.
Ever since visual content has become an important form of communication, businesses have been widely incorporating three-dimensional rendered images. The reason can be many, but the primary ones include marketing and promotion.
If you’re interested to learn more about the 3D rendering process, then continue reading. This guide will help you understand the basics of 3D rendering, including how it works, types of techniques, time, cost, and real-world applications.
3D Rendering: Meaning
3D rendering is the process of generating a 2D image from a 3D model. The process requires a specialized software program that can take in the data of a three-dimensional model and then use it to produce a 2D image. This information is usually about the color, texture, lighting, or material of an object depicted in the three-dimensional model or scene.
You can create a variety of images with the 3D rendering process, be it non-realistic or photorealistic. By photorealistic, we mean that the three-dimensionally rendered images will look just like the real photographs taken with a traditional camera and will be hard to differentiate them.
Earlier, three-dimensional rendering was only accessible to large business organizations having lots of money and resources. However, today, this technology is nearly accessible to anyone. It’s because the software and tools needed to carry out the process are widely available.
Now, organizations don’t need to have a big budget to create 3D rendered images. Businesses of any size can develop them without using up their entire budget. Let’s learn why and how it is possible by understanding the 3D rendering process.
3D Rendering Process: How it works?
Three-dimensional rendering is a complex process. This can be especially true for those who are new to the domain. To make it easier for you to understand, we have broken down the process into five stages. But, there are a few things you will need first.
To render a final product that looks professional and appealing, you need to have the right software and tools. In addition to that, you will need to have some experience to plan a strategy to create the 3D render.
In general, the process of 3D rendering primarily includes the following stages.
Stage 1: 3D Modeling
To render an object or scene in 3D, you first need to have a digital model representing the surface of that particular object or scene. You’ll need software to develop the three-dimensional models. If you don’t know how to create a 3D model, then you can use the help of a 3D modeler or artist.
Stage 2: Lighting
In this stage, you’ll create lighting effects like motion blur or refraction to create the illusion of a three-dimensional image. To do so, you need to use the 3D modeling software to simulate professional or natural lighting sources.
Stage 3: Texturing
In the third stage, the software gathers information regarding the light and color variations to map the texture of the surface of a 3D object or scene. Texturing is the most critical step in three-dimensional rendering since it aids in imparting the photorealistic look to the rendered images.
Stage 4: Rendering
In this step, the modeling software generates a high-resolution image by converting the three-dimensional model. You can further incorporate this image into different types of visual content.
Stage 5: Refining
If done with 3D model rendering, you can carry out additional editing to refine the 2D image. You may further add light, texture, or implement other photo editing processes to fine-tune it. After the refining is complete, the photorealistic 2D image will be fully rendered and ready to be used in different applications.
Types of 3D Rendering Techniques
Various types of 3D rendering techniques have been developed over time to meet varied business needs. Nevertheless, the objective still remains the same, i.e., capturing the image in which the light hits an object in real life. Here are the different techniques used for the same.
Technique 1: Rasterization
Rasterization is one of the oldest methods of 3D rendering. In this technique, a three-dimensional model will be treated as a polygon mesh, where each polygon will have vertices projected onto a plane normal to the perspective. These vertices will contain information related to color, texture, position, etc. Now, keeping the vertices as the border, colors will be added to the remaining pixels.
The technique is similar to what we did as kids while painting, i.e., creating an outline and then adding the colors. This type of rendering is still popular today, especially while producing real-time renderings like interactive GUI, simulation, and computer games. Moreover, the technique has been recently improved by anti-aliasing and higher resolution.
Technique 2: Ray Casting
Even though rasterization is useful, there’s a drawback. It faces issues if overlapping objects are present. So, if the surfaces of the objects overlap, there’s a high possibility that a wrong object will be rendered.
To overcome this issue, a concept was developed that involved a depth sensor indicating which surface is above or under in a particular view, known as the Z-buffer. However, the concept soon became unnecessary after ray casting was introduced. Unlike rasterization, ray casting doesn’t face the problem of overlapping surfaces.
In the ray casting technique, rays are cast onto the three-dimensional model from the point of view of the camera. The rays will be drawn out to each pixel on the plane of the image. The first surface which the rays hit will be rendered and any other intersection after that won’t be considered.
Technique 3: Ray Tracing
Despite having a lot of advantages, the ray casting technique was unable to stimulate refractions, reflections, and shadows properly. That is when ray tracing came into play.
The ray tracing technique is similar to ray casting but it is better when it comes to depicting light sources. Here, the primary rays are cast onto the three-dimensional models from the camera’s point of view for developing secondary rays. Once it hits the model, the reflection, refraction, or shadow rays will be emitted depending on the properties of the model’s surface.
In case the surface causes a hindrance in the shadow ray’s path before it reaches the light source, then the shadow will be cast onto another surface. When it comes to a reflective surface, the resulting reflection ray will emit from an angle and illuminate any surface it will come across.
Due to this, the technique is sometimes referred to as recursive ray tracing. In the case of a transparent surface, the resulting refractive ray will be emitted if a secondary ray hits the surface.
Technique 4: Rendering Equation
With further developments in 3D rendering, the final technique that we are about to discuss is introduced, i.e., rendering equation. This technique attempts to accurately showcase how light is emitted not just from a single source but from everything.
Unlike ray tracing, the equation will consider all the light sources in the render instead of using only direct illumination. An algorithm was also developed with the help of this equation called indirect illumination or global illumination.
How long does it take to 3D Render?
The time to create a 3D render is dependent on various factors, such as your starting point, the 3D rendering software you use, the context, etc. So, it is hard to mention a specific time for creating a three-dimensional render.
For instance, let’s say you have an eCommerce site and you want to create rendered images for your product catalog. Then, depending on the number of products, the work may take up to several days. But, as compared to the traditional product photoshoot, it will be faster.
Let’s consider another possible application of three-dimensional rendering, i.e., creating 3D renders for product customization. This will enable shoppers to customize products in real-time while shopping on the website.
They can easily change the features or color of a product to see what it looks like via product visualization. For this, you’ll need an interactive 3D application to develop the real-time 3D renderings of the products instantly.
Let’s talk about another scenario where you need to develop the rendered images from scratch. In that case, it will take some time to develop the renders since you have to create a three-dimensional model first. However, in the above examples, you will probably have a 3D file for your product that is ready to use.
What is the Cost of 3D Rendering?
Three-dimensional rendering is much affordable now than it was decades ago. This is due to the ease of availability of 3D rendering software. However, when it comes to the cost, it may vary depending on how you use it.
Let’s discuss the 3D rendering costs as compared to its popular alternatives.
Traditional Product photography
3D product rendering uses less time and money as compared to traditional product photography. Aside from that, it will enable you to generate images from different angles of the product. The same cannot be possible with traditional product photography as you’ll be limited to what the photographer will shoot.
There has been an increasing demand for interactive content by online shoppers. But, shooting videos for every product will not only be expensive but use more bandwidth, which customers won’t like to spare. In that case, rendered images are an excellent alternative.
Through three-dimensional product rendering, customers can manipulate the product to view it from different angles. They can also view the products in GIF or other file formats. The images will be smaller and hence, less data-intensive as compared to videos.
Besides, some brands are using 3D rendering along with technologies like virtual reality (VR) and augmented reality (AR) to create rich visual content. This has become quite popular and companies employing these features will be prepared to give a tough competition to their competitors, especially in the field of eCommerce and entertainment.
Applications of 3D Rendering in Real World
Ever since virtual product images helped in efficiently communicating complex information, 3D rendering has become a valuable asset across many disciplines. It first became popular in the entertainment industry and was widely used in filmmaking, TV production, and video game development. But, now, it is being used in a wide range of industries, such as
- Real estate and architecture, for developing virtual 3D home tours, architecture 3D designs, furniture 3D designs, and 3D interior renderings
- Retail, for displaying eCommerce products in an interactive 3D environment and creating photorealistic product prototypes
- Automotive design, for creating real-life working models of automobiles and vehicles which is cheaper than developing blueprints
- Engineering, for developing technical illustrations of engineering projects
- Medical imaging, etc.
From this, we can conclude that as more brands and industries discover the benefits of 3D rendering, the more growth and development it will see in the upcoming years. Also, due to its ease of accessibility, many industries will use it to make their processes faster, efficient, and cost-effective.
Besides, 3D rendering can not only help to transform the brands but also consumers. With better e-commerce product images, customers will have higher levels of satisfaction and an amazing shopping experience.
So, if this article motivated you to use 3D rendering for your business, we assure you that will be a wise decision for your business. It will help your company easily communicate complex visual information in a clear, precise, and cost-effective manner. If you’ve zero experience in the field and don’t know where to start, then maybe choosing a platform offering 3D rendering services can help.
We are also a 3D design company holding immense specialization in providing 3D rendering services. So, if you need help with creating photorealistic 3D renderings that can help your business gain more customers and sales, reach ThePro3DStudio! We would be happy to help you and your business prosper.Contact Us