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

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Black Watch
Tartan		 Bouncy Ball Candy Cane Chain Link
Fence		 DogTooth Drunken Road
Lines		 Electricity
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Escher I Escher II FireBall Firewall Gridlines Hell!! Interference
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Lightning I More ZigZags Orange Peel Road Lines Tri-Coloured Warning Sign ZigZag
RJJ Linear This texture provides a linear gradient in the X, Y or Z axes. The gradient may be applied in any or all of the axes at once. The function of the texture is to provide a linear gradient between Colour 1 and Colour 4, encompassing Colours 2 and 3 along the length of the specified axis. In other words the length of texture axis determines the "length" of the gradient for that axis.

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's filter values.
Reflect The pattern can be used to affect the object's reflectivity values.
Gradient The pattern can be applied along any or all of the texture axes.