ABOUT 3D RENDERING
3D Rendering is the process of producing an image based on a three-dimensional greed or woxels. 3D Visualization process is similar to creating photography you are lighting and staging scenes and producing images. When a team is working on a 3D scene, the models are actually a representation of points, vertices and polygons in three-dimensional space.
TYPES OF RENDERING
INTERACTIVE RENDERING — You can control render in real time. It is necessary to see in real time the materials and the environment. Calculation of lighting and material settings are available in real time
OFFLINE RENDERING — This type of rendering occurs offline within a specified period of time. Advantage of this type of render is a high resolution image, and greater photorealism.
There are two major calculation techniques
SCANLINE RENDERING is polygon by polygon rendering technique.
Scanline techniques used in conjunction with precomputed lighting can achieve speeds of 60 frames per second or better on a high-end graphics card.
RAYTRACING- In raytracing, one (or more) ray(s) of light are traced from the camera to the 3d objects. The light ray is then passed through a set number of «bounces», which can include reflection or refraction depending on the materials in the 3D scene. The color of each pixel is computed algorithmically based on the light ray’s interaction with objects in its traced path.
This is just a brief overview of the basics of rendering engines
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