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Render background

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    Sparrow Hawk
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In computer graphics, "rendering" refers to the process of generating an image from a model by means of computer programs. Sometimes the term "rendering" is used interchangeably with "image synthesis," although image synthesis includes methods that are not necessarily based on 3D models, such as pre-rendering and post-rendering.

Rendering is one of the most compute-intensive tasks in graphics. It is often the bottleneck that determines the achievable frame rate in interactive graphics applications such as video games and simulations. The goal of rendering is to produce a high-quality image as efficiently as possible.

There are two main types of renderers: rasterization-based and ray tracing-based. Rasterization-based renderers convert the 3D models into 2D images by breaking them down into tiny fragments called "pixels." Ray tracing-based renderers trace the path of light through the 3D scene to determine what colors should be displayed at each pixel.

Rasterization is the primary rendering technique used in modern graphics hardware. It is fast and capable of producing high-quality images, but it has some limitations. Ray tracing is a more accurate rendering technique, but it is much slower and is not practical for real-time applications.

Rendering equation

The rendering equation is a mathematical model that describes how light is transferred from one place to another in a 3D scene. It is the foundation of all rendering algorithms, both rasterization-based and ray tracing-based.

The rendering equation is:

    L(x,y,z) = L_e(x,y,z) + \int_{\Omega} f_r(x,y,z,\omega) L_i(x,y,z,\omega) \cos \theta d\omega

    where:

    L(x,y,z) is the radiance at point (x,y,z)

    L_e(x,y,z) is the emittance at point (x,y,z)

    f_r(x,y,z,\omega) is the reflectance at point (x,y,z) in direction \omega

    L_i(x,y,z,\omega) is the incident radiance at point (x,y,z) in direction \omega

    \theta is the angle between the surface normal and the direction \omega

    \Omega is the solid angle

The rendering equation is a general equation that applies to all types of light transport, including reflection, refraction, and transmission. It can be used to calculate the radiance at any point in a scene, given the reflectance, emittance, and incident radiance at that point.

Rasterization

Q: What is background render?

A: The background render is a process that runs in the background while you work on your project. It renders the project so that it is ready to be played back or exported.

Q: What is a rendered image?

A: A rendered image is a digital image that has been created by a computer using 2D or 3D software.

Q: How do I make a render background black?

A: There are two ways to do this:

  1. In the Render Settings dialog box, under the Output tab, select "Color" from the "Background" drop-down menu.

  2. In the Scene tab of the Render Settings dialog box, select "Scene" from the "Background" drop-down menu.

Q: How do I turn off background render?

A: To turn off background render, go to the "Render" tab, and click on the "Background Render" button.