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

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Galaxy
Uses rjwood		 Hypnotise Mega Hypnotise Joe90 Super Hypnotise Tripping
Uses rjgrain and rjcircle		 Acid
rjspiral example rjspiral example rjspiral example rjspiral example rjspiral example rjspiral example rjspiral example
Ninja Star
Uses rjring		 Alien Symbol
Uses rjring		 WhirlPool
Uses rjcaust		 Spiral Star
Uses rjstar		 60s FAB
Uses rjstripe		 Fire Storm
Uses rjscheck		 Strawberry Swirl
Uses rjmarble
RJJ Spiral This texture provides a spiral around any of the texture axes. The number of arms may be specified. The overall scale of the texture is determined by the texture axes.

Frequency The repetition rate of the pattern can be modified.
Phase The phasing of the pattern can be tightly controlled.
Turbulence Turbulence can be added with the size, period, noise and number of octaves all being controllable.
Colour Maps Each texture can have a up to four colours in its colour map. This can be expanded indefinitely using additional textures.
Alpha Maps Each texture can have a up to four Alpha values in its colour map. This can be expanded indefinitely using additional textures.
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 texture can be used to control the scale of the next texture applied.
Filter The pattern can be used to affect the object filter values.
Filter The pattern can be used to affect the object's filter values.
Reflect The pattern can be used to affect the object's reflectivity values.
Around The pattern can be applied around any of the texture axes.
Spiral Arms The number of spiral arms is fully definable.
Spiral Types Two user selectable spiral types are avaiable.
Waveforms Ability to select one of two ramping waveforms for the colour blending.