3D Rendering in real time and non real time

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The 3D rendering is the final process of creating the real 2D image or the animation from the prepared scene. This can be compared to taking a picture or taking the scene once the configuration is complete, in real life. Rendering can take from fractions of a second to a few days for a single image. In general, different methods are better for photo realistic or real-time representation.

Real time

The representation of interactive media, such as games and simulations, is calculated and displayed in real time, at a speed of approximately 20 to 120 frames per second. In the representation in real time, the objective is to show as much information as possible, which the eye can process in a fraction of a second. The main objective is to achieve the highest possible photo realistic degree with an acceptable minimum reproduction rate. In fact, farms can be applied in the way the eye perceives the world. The final image presented is not necessarily that of the real world, but an image close enough to be tolerated by the human eye. A 3D rendering can simulate visual effects such as lens illumination, depth of field or motion blur. These are attempts to simulate visual phenomena resulting from the optical characteristics of the cameras and the human eye.

Non real time

Animations for non-interactive media, such as movies and videos, become much slower. The non-real-time representation allows the use of limited processing power to achieve superior image quality. Processing times for individual images can vary from a few seconds to several days for complex scenes. The rendered images are stored on a hard disk and can be transferred to another medium, such as a moving image or an optical disc. These images are displayed sequentially at high frame rates, usually 24, 25 or 30 frames per second, to give the illusion of movement.

Techniques have been developed in order to simulate other natural effects, such as the interaction of light with various forms of matter. Examples of such techniques include particle systems, caustics and subsurface diffusion.

The rendering process is computationally expensive, given the complex diversity of simulated physical processes. The power of computer processing has grown rapidly over the years, allowing a realistic representation of more and more. Movie studios that produce computer-generated animations often use a rendering farm to generate images in a timely manner. However, the decrease in hardware costs means that it is quite possible to create small amounts of 3D animation in a computer system at home. The rendering output is often only used as a small part of a completed animated movie scene. Many layers of material can be processed separately and integrated into the final shot using the composition software.

Location: Australia

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