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Rendering as virtual photography
- Once we have our 3D objects modeled and textured, we can move on to rendering images. Rendering is the virtual equivalent of photography. We take our objects, we add lights and cameras, and then we take a picture, or render, the final image. Now, the 3D process is similar to photography, but because it happens in the computer, we have a lot more control over the process. First off, we can choose different types of renderers, much like how a photographer may choose different film. Each renderer is a little bit different and has its own look. Some of the more popular types are: scanline renderers. Scanlines are fast and probably the simplest. They can look great, but advanced optical effects are difficult to simulate. Raycasting uses the camera as a source of rays, which are cast into the scene. It is fast enough for real time and a lot of game engines use it. Raytracing is similar to Raycasting, but it traces rays as they…
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