What is 3D Render or Rendering
Rendering or image synthesis is the process of generating a photorealistic or non-photorealistic image from a 2D or 3D model by means of a computer program. In the context of our discussion, it refers to the process of transforming a 3D scene into a static image or a sequence of frames (commonly known as frame sequencing, particularly when rendering animations). Within 3D content creation software like 3ds Max, Cinema4D, SketchUp, and others, scenes are rendered through intricate mathematical computations, resulting in a visually compelling image.
Rendering stands as a fundamental subtopic in 3D computer graphics, intricately linked to other aspects of the field. Positioned at the conclusion of the graphics pipeline, it plays a pivotal role in imparting the definitive appearance to any 3D scene. The escalating demand for computer graphics since the 1970s has elevated rendering into a distinctly prominent subject.
Scope of Application
Scene rendering finds application in various domains, including computer video games, simulations, films, commercials, television special effects, and architectural 3D visualization. Each field necessitates a unique balance of functions and computational methods. Let's delve into a few examples to better understand the diverse applications of rendering:
In this advertisement, the manufacturer opted to substitute a tangible pack of chips with a 3D model, subsequently undergoing the rendering process. This strategic shift has significantly streamlined the production of commercials for diverse markets. As a pack of chips tailored for different countries necessitates distinct appearances, the traditional approach of shooting numerous takes with various pack options has become obsolete. Now, a single 3D-modeled image suffices, offering the flexibility to create packs tailored to specific preferences without the need for extensive photo shoots.
Now, on the TV screen, anything and anyone can be brought to life without the need for physical mock-ups, mannequins, wigs, or makeup. Utilizing 3D models with subsequent rendering not only saves time but also reduces the costs associated with producing special effects.
Viarde Studio, based in Ukraine, produced this render for a furniture factory, showcasing the transformative impact of 3D rendering. Manufacturers in various industries, including furniture, lighting, and appliances, no longer need to allocate funds for expensive photo studios to showcase their products effectively. Thanks to 3D rendering studios, this process can be completed in just a few days at a significantly lower cost.
Methods of rendering: pre rendering or real time
Rendering systems utilized by 3D editors to generate visualizations can either be built-in to the program or external plug-ins installed separately. External rendering systems often boast superior visualization quality compared to built-in ones because they are developed independently of the 3D editor. The development team can focus solely on enhancing their product without the distraction of working within a 3D editor, giving them more time and opportunities to make their product the best on the market. However, this often comes with an additional cost, unlike built-in render systems.
In the realm of 3D graphics, rendering can be sluggish, both in pre-rendering mode and real-time rendering.
Pre-rendering is a visualization method suitable for environments where speed is not crucial, and image calculations are executed using multi-core CPUs rather than dedicated graphics equipment. This rendering technique is predominantly employed in animation and visual effects, where achieving the highest level of photorealism is essential.
Real-time rendering is an exceptional technique used in interactive graphics and games, demanding rapid image creation. Given the high level of user interaction in such environments, real-time imaging becomes imperative. The integration of dedicated graphics hardware and the precompilation of available information significantly enhances real-time rendering performance.
Rendering in Architectural 3D Visualization
Today, Vray and Corona Renderer stand out as the foremost and high-quality systems in the realm of architectural 3D visualization, both proudly under the umbrella of Chaos Group, based in Bulgaria.
Vray, making its debut in 2000, has etched its name across diverse visualization domains, proving its mettle through flexibility and an extensive toolkit adaptable to various studios, be they animation or architectural companies. Its enduring popularity stems from:
- Network Rendering: Vray supports the seamless collaboration of multiple computers for rendering tasks.
- Versatile Settings: Offering an expansive array of settings catering to a myriad of tasks associated with three-dimensional graphics.
- Abundant Material Library: Boasting a vast collection of materials, empowering users to bring their creative visions to life.
- Passes Support: Vray facilitates the generation of a comprehensive set of passes, facilitating the composition of images or videos.
On the other front, Corona Renderer emerges as an external, modern, high-performance, photo-realistic render compatible with Autodesk 3ds Max and MAXON Cinema 4D. The roots of Corona Renderer trace back to 2009 when Ondrej Karlik, then a student at the Czech Technical University in Prague, initiated the project. Over time, Corona evolved into a full-fledged commercial endeavor, with Ondrej joining forces with Adam Hotovi and Jaroslav Krzhivanek. In 2017, the Chaos Group's inclusion marked a significant chapter in Corona's journey, fostering further expansion and growth. Despite its youthfulness, Corona Renderer has positioned itself as a formidable contender, capable of delivering high-quality results.
Corona Renderer's primary allure lies in its ability to achieve remarkably realistic visualization with user-friendly system settings. This simplicity makes it an ideal choice for beginners tasked with more straightforward projects.
Render Speed: Unleashing the Power of 3D Visualization
Rendering systems, like any software on a computer, demand specific resources, primarily reliant on the processing power of the CPU and the available RAM. These are commonly referred to as CPUs. Additionally, there is the GPU, a rendering system utilizing the capabilities of a graphics card. Notably, certain rendering engines, such as Vray, offer the flexibility to utilize both CPU and GPU for rendering tasks.
The time required for rendering hinges on critical factors: scene complexity, the number of light sources, and the presence of high-poly models or materials with transparency or reflectivity.
Rendering is a resource-intensive process, making a standard office PC unsuitable for the task. To optimize rendering efficiency, a specialized computer setup is essential. While all rendering systems come with adjustable settings to expedite the process, these adjustments often involve compromises on image quality.
For those seeking to expedite rendering, leveraging network rendering or utilizing a pre-existing render farm on the internet proves advantageous. This entails distributing rendering tasks across multiple computers connected via a local network or the internet. To achieve this, all participating computers must share the same rendering program, 3D editor, and plugins as the primary computer initiating the render.
In conclusion, rendering systems find increasing utility across diverse industries, including films, cartoons, architecture, advertising, and automotive, among others. When encountering static images or animations, there's a strong likelihood that rendering has played a pivotal role in crafting the final visual outcome.