10 July

3D Graphics

Some basic facts about 3D rendering – Overview

Man has never rested satisfied and this never-ending vigor to innovate for betterment has bestowed him with infinite provisions. With the introduction of three-dimensional technologies, the great positive impact is being enjoyed in the multiple domains. There is a huge population that outsource 3D rendering in India to any of the leading 3D rendering companies. Optimal use of advanced technologies and dedicated workforce are prominent among many reasons for the increasing favoritism of India as an outsourcing destination.

What exactly is 3D rendering?

In shortest of the word, 3D rendering is capturing a 3D environment into a 2D image.

The process starts with applying of experiences by means of properties such as reflections, illuminations, bumps and refraction. The final desired feel is obtained by lighting the concerned object. Based on the specific setting assigned, render engine renders the image. This process can be effectively executed by the trained professional in any of the best 3D rendering companies in India.

Types of 3D rendering

Three-dimensional niche is always dynamic and progressions happen continuously. New methods and technologies are introduced too often to which a best 3D rendering company in India adapts without any delay.

However, there are 2 main types of 3D rendering and they are real-time rendering and pre-rendering. Former finds application in gaming where images have to be delivered in the real time. Pre-rendering or offline rendering finds application where speed is not an issue.

  1. Real-time rendering

    It is used mainly for gaming as well as interactive graphics in which images are to be figured out from three-dimensional information rapidly.

    • Interactivity: As it is not possible to foresee how a player is going to interact with a game environment, images should be rendered on a real-time basis while the action unfolds.
    • Speed matters: For making the motion resemble fluid, 18 – 20 fps has to be rendered. Lesser fps will make the action look choppy which is undesirable.
    • The methods: It can be improved significantly by making use of dedicated graphics hardware or by pre-assembling maximum possible information.
  2. Offline or pre-rendering

    It works in situations when speed is not that an issue and where calculations are performed by making use of multi-core CPUs.

    • Predictability: It can be seen extensively in animation as well as effects related works where photorealism and visual complexity are of much-advanced standard. As no unpredictability is there, large studios dedicate even up to 100 hours render time for individual frames.
    • Photorealism: As offline rendering happens within an open time-frame, elevated photorealism levels can be attained than with the real-time rendering. Characters, settings and all their associated lights and textures are characteristically allowed more polygon count and higher resolution texture files.

Common rendering techniques used

Mainly there are three rendering techniques used by the by the companies offering 3D rendering services namely scan-line rendering, ray-tracing, and radiosity. To achieve greater results most of the times, these techniques are employed in conjunction to each other.

  • Scanline (or rasterization)

    When speed is mandatory, this type of rendering finds its application; this makes it a method of choice for interactive graphics and real-time rendering. As an alternative of image rendering on a pixel-by-pixel base, scanline renderers proceed on the basis of the polygon by polygon. Scanline techniques when used together with pre-calculated lighting can obtain a speed of 60 fps or even better rates on a better quality graphics card.

  • Raytracing

    Here for all pixels in a scene, one or even more of light rays are mapped out from a camera the 3D object in its closest proximity. Following that, the light ray is subjected to several “bounces”, including reflection or else refraction based on materials in the 3D scene. Each pixel’s color is figured algorithmically as per the interaction of light rays with objects in the traced path. Raytracing can achieve greater photorealism when compared to scanline; the pitfall of former is its drastically slow nature.

  • Radiosity

    It is calculated without any camera consideration, and it is not done pixel by pixel; rather radiosity is surface oriented. The radiosity’s primary function is to more precisely act out the external color by accounting for implied radiance. Radiosity is characterized typically by lenient progressed shadows as well as color bleeding in which light from the luminously highlighted objects “bleeds” onto the adjoining surfaces

Though rendering depends on extremely advanced calculations, software these days avail easily understandable parameters so that an artist need not deal with calculations and mathematics that underlies. All main 3D software packages include a render engine and there are also lighting and material packages with almost all thus facilitating achievement of stunning photorealism levels.

Two most popular render engines

  1. Mental Ray

    Packaged in Autodesk Maya, it is extremely adaptable, comparatively swift and perhaps the fit renderer for those character images in need of subsurface scattering. A blend of global illumination and raytracing is used in Mental ray.

  2. V-Ray

    Typically V-Ray is made use of along with 3DS Max. The pair can together work wonders for environment rendering and architectural visualization. VRay supersedes its counterparts with its superior lighting tools and wide-ranging materials library.

  3. Hope you enjoyed reading the post. To know more about the tips, trends and latest news regarding 3D strides, keep reading our blog and we promise to keep you updated. Also, read more about 3d rendering benefits.