Template:Rendering introduction
Rendering is the process of transferring a view on a 3D scene to a 2D image of that scene, according to the position of the viewer. Typically one would use a camera in a 3D computer model to determine the view. The computer can then calculate the 2D image: rendering.
The picture shows a rendering technique used centuries ago to get the perspective right in 2D sketches. It uses a raster (grid) to get the positions right when transferring the view to the 2D image. You could compare this to the grid of pixels that is used by modern computer renderings. The 'needle' makes sure they eye is always in the same position (moving it, would change the view and thus the image). You could compare it to the camera when rendering a 3D computer model.
