RJJ SpotBump Texture 
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What are RJJ Textures RJJ Textures are a set of procedural textures for use with Impulse's ray tracer, Imagine for Windows. They are a set of colour and bump textures that share a common set of user definable parameters. In addition, they all inter-relate so that bump colours can be modified by other RJJ textures and material maps can be generated to blend other RJJ textures together.

RJJ SpotBump Examples Here's just few textures RJJ SpotBump can generate....

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Basic Bump Dented Toadstool
Uses rjgrain		 Plated Skin
Uses rjbozo		 Stringy Cheese
Uses rjbozo		 Smooth Underside
Uses rjlinear		 Wavey Copper
RJJ SpotBump This texture provides spot bumps rather like leopard or dalmation spots but as a bump. The overall scale of the texture is determined by the texture axes.

Bump Height The bump height can be controlled to give bumps or spots.
Clipping The top and bottom of the bumps can be clipped to give flat plateaus and plains.
Turbulence Turbulence can be added with the size, period, noise and number of octaves all being controllable.
Material Maps Any texture can be used to control the application of other textures. These can be any of the RJJ colour or bump textures.
Scale Maps Any colour texture can be used to control the scale of the next texture applied.
Octaves The "jaggedness" of the spots can be controlled by changing the number of octaves.