What is a preliminary view?

Vista is a concept with different uses. In this case, we are interested in mentioning its meaning as a result of vision (the perception of objects through the eyes) and as the disposition of something according to the sense of vision. The preliminary is the one that precedes an action or that works as a preamble to something.

The idea of ​​preview or preview is used in the field of computing to name the possibility of viewing a document on the screen of a computer (computer) before confirming a certain action. This option is generally used when the user wants to print the document and wants to see how the information would look on paper.

Suppose a man who is looking for a job wants to send his resume to various companies. To do this, he uses a word processor on his PC, details his work experience and includes a photograph of his face. Before printing multiple copies of your document to place on paper and distribute it, use the preview option to see how different elements of your document (text, photo, etc.) will look on the page. If the result is satisfactory, you can proceed to printing the resume. On the other hand, if you don’t like the result, you have the possibility to modify the document before putting it on paper. The preview can also be used in graphics editors to review effects or changes applied to an image before committing and saving the changes. In summary, we can say that the preview helps us to save time and energy , so it is always associated with a previous step in a relatively complex process. Returning to the example of word processors, printing a document can take several minutes, or even more than an hour, depending on the length, and this leads to the consumption of sheets of paper, ink cartridges and electrical energy, in addition to the fact that occupy the printer all this time; For this reason, it is very useful to use the preview option to avoid a big waste of resources. Although the preview is very common in the area of ​​word processors and applications for viewing documents of different types, it is also present in more specific programs, such as those for three-dimensional design. Regardless of the name that developers give to each function, we can say that 3d professionals have several ways to preview their creations before taking the final step, the most time-consuming: rendering.

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To define the concept of rendering in a nutshell, let’s say that it is a process by which the final image is obtained, applying to the scene all the effects that the designer has included, such as lighting and shading, reflections, particle simulation. , bumps and hair, among many others. Depending on the characteristics of the computer, rendering a single image can take anywhere from a few seconds to hours; If we are talking about a movie, then the number of images increases considerably, since it is normal to produce 24 frames per second. Bearing all this in mind, it is more than convenient to preview a frame before rendering it, as noticing an anomaly in this step can save hours or days of work. It is noteworthy that the visualization in a 3d design program, and even in 2d , does not show such a faithful representation of the final result, contrary to what happens when we visualize a text document before printing it; With this step we save the complex calculations that would give rise to the processed image, for which we see an approximation of it.

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