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ART TECHNIQUE The pictures in the art gallery are examples of 3D computer art. This technique involves making three dimensional models in the computer, asigning them materials and then rendering them into a picture. The models can be made from basic shapes such as spheres, cubes and cones which are then distorted, sculpted and combined to make more complex models. Shapes can be made negative, they will then cut into any positive shape, the negative being invisible. | ||
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A model of a cube | ||||
A model of a cube intersected with a negitive sphere | ||||
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The model will then have a material assigned to it, this defines what the model appears to be made of. Colour, reflectance and refraction are among the attributes which can be given to the model. Bump can also be added to give a roughness to the surface of the model. There are many other factors which go to make up the overall look of the final picture. These include atmosheric effects such as cloud type, height and density, sky colour, haze and fog. Lighting also plays an important part in the final result. Once all these factors have been set the picture can be rendered. To render the picture the computer works out the paths of millions of individual rays of light from the light sources and tracks them as they hit the models to be reflected off them, absorbed by them or refracted through them. From this information the picture is produced. To render a picture of the quality of our prints takes days and in the case of some of the more complex pictures weeks of a computer running 24 hours a day. In reality a lower quality test render is done and then the models, lighting or materials altered until a satisfactory test render is achieved, only then is a full quality final render made. | ||
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Cubes of various materials | |||||||
A cube intersected with a negitive sphere. | |||||||
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