I played around with some functions tonight following the call to the Perlin Noise function and got some cool effects. I am now also running a Cosine interpolation on these instead of a Linear interpolation. It doesn't make a huge difference but the colours appear to blend together a little bit better. Also it just added an extra couple of multiplications and a cosine call for each winning intersection's colour method, so that's not too computationally expensive.
Linear interpolation
Cosine interpolation, note the slightly better blending of the two colours together
Wood texture
A nicer wood texture image with better, more "wood-like" colours
Cool wavy texture, noise multiplier = 1
Cool wavy texture, noise multiplier = 5
Cool wavy texture, noise multiplier = 10
Marble texture using Perlin's Noise function
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