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Illustration week 7 - Coggle Diagram
Illustration week 7
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The nuance (A nuance is when something is changed but not easily noticed) of the meaning of the word ‘render’ actually allude to these considerations:
to submit or present;
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to express in another language or form, or to translate;
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Rendering tonal values
Hatching is where a pattern of parallel lines is used to create tonal value. The lines can be made thicker, drawn more closely together or indeed, both thicker and closer, to create a denser pattern and so a darker tone. Hatching can readily be achieved with any drawing implement
Scribbling or scumbling is where a random, multi-directional pattern is used to create tonal value. This may include judicious use of smudging techniques (though purists like to keep their lines clean). For this reason, it is perhaps more suitable for pencil, charcoal, pastels or crayons but it can be achieved quite successfully with a pen.
Stippling is made up of point marks or dots, usually in a random pattern. Density is built up by applying the dots more closely together. This technique is most readily achieved manually with a pen. An alternative is to use a stiff brush like a toothbrush loaded with ink.In this case, the stippling is created by using a finger to cause the bristles to flick towards the paper. Masking of areas to stay clean of stipple may be required
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Lighting
Overall the patterns of light and shade are important compositional elements. They contribute to what Edwards calls the gestalt, or the representation of “the ‘thingness’ of the thing”. They also define the figure-ground relationship (refer Lecture Week 3) and help to provide the depth cues (refer Lecture Week 4) by which spatial depth may be interpreted.
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Likewise, when we consider techniques for rendering light, shade, texture and colour in illustration and visualisation, the appropriate method to use will depend on the communication objective.
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Scales of Grey
n a typical black and white photographic print, for example one that might be the source for an image reproduced in a newspaper, the way the tones merge and blend into one another is referred to as “continuous tone”. We can make a scale of tones that smoothly transitions from the lightest tonal value (white) to the darkest tonal value (black) and this can be called a continuous tone grey scale.
Tonal values differentiate shapes, reveal form, and describe texture (surface)
There are a number of advantages to using these techniques. Not only can tonal value of light as it falls across and reflects off surfaces and creates shadows be effectively represented by the density of the marks, but also volumetric form can be indicated by making use of line direction and, textures and patterns of surfaces may be incorporated into the rendering method. Varying the width and quality of strokes can introduce additional expressive qualities.